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12204220 = 2257179487
BaseRepresentation
bin101110100011…
…100010111100
3211222001001011
4232203202330
511111013340
61113325004
7205506550
oct56434274
924861034
1012204220
116986236
124106764
1326b3c42
141899860
1511110ea
hexba38bc

12204220 has 48 divisors (see below), whose sum is σ = 29514240. Its totient is φ = 4152384.

The previous prime is 12204211. The next prime is 12204221. The reversal of 12204220 is 2240221.

It is a self number, because there is not a number n which added to its sum of digits gives 12204220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12204221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24817 + ... + 25303.

It is an arithmetic number, because the mean of its divisors is an integer number (614880).

Almost surely, 212204220 is an apocalyptic number.

12204220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12204220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14757120).

12204220 is an abundant number, since it is smaller than the sum of its proper divisors (17310020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12204220 is a wasteful number, since it uses less digits than its factorization.

12204220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 12204220 is about 3493.4538783273. The cubic root of 12204220 is about 230.2342918160.

Adding to 12204220 its reverse (2240221), we get a palindrome (14444441).

The spelling of 12204220 in words is "twelve million, two hundred four thousand, two hundred twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 179 358 487 716 895 974 1253 1790 1948 2435 2506 3409 3580 4870 5012 6265 6818 9740 12530 13636 17045 25060 34090 68180 87173 174346 348692 435865 610211 871730 1220422 1743460 2440844 3051055 6102110 12204220