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10220220 = 2232556779
BaseRepresentation
bin100110111111…
…001010111100
3201020020111200
4212333022330
510104021340
61003015500
7152604363
oct46771274
921206450
1010220220
11585066a
12350a590
13216ab8a
1415007da
15d6d330
hex9bf2bc

10220220 has 36 divisors (see below), whose sum is σ = 31001880. Its totient is φ = 2725344.

The previous prime is 10220159. The next prime is 10220239. The reversal of 10220220 is 2202201.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28210 + ... + 28569.

Almost surely, 210220220 is an apocalyptic number.

10220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10220220 is an abundant number, since it is smaller than the sum of its proper divisors (20781660).

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

10220220 is a wasteful number, since it uses less digits than its factorization.

10220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56794 (or 56789 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 10220220 is about 3196.9078810626. The cubic root of 10220220 is about 217.0134984206.

Adding to 10220220 its reverse (2202201), we get a palindrome (12422421).

It can be divided in two parts, 10220 and 220, that added together give a triangular number (10440 = T144).

The spelling of 10220220 in words is "ten million, two hundred twenty thousand, two hundred twenty".