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12220030 = 251222003
BaseRepresentation
bin101110100111…
…011001111110
3211222211201201
4232213121332
511112020110
61113530114
7205603624
oct56473176
924884651
1012220030
1169970a9
12411393a
1326bb1b4
1418a1514
151115b3a
hexba767e

12220030 has 8 divisors (see below), whose sum is σ = 21996072. Its totient is φ = 4888008.

The previous prime is 12220003. The next prime is 12220031. The reversal of 12220030 is 3002221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 1222003 = 12220030 / (1 + 2 + 2 + 2 + 0 + 0 + 3 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 12219989 and 12220016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610992 + ... + 611011.

It is an arithmetic number, because the mean of its divisors is an integer number (2749509).

Almost surely, 212220030 is an apocalyptic number.

12220030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12220030 is a deficient number, since it is larger than the sum of its proper divisors (9776042).

12220030 is a wasteful number, since it uses less digits than its factorization.

12220030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222010.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 12220030 is about 3495.7159495588. The cubic root of 12220030 is about 230.3336681920. Note that the first 3 decimals are identical.

Adding to 12220030 its reverse (3002221), we get a palindrome (15222251).

The spelling of 12220030 in words is "twelve million, two hundred twenty thousand, thirty".

Divisors: 1 2 5 10 1222003 2444006 6110015 12220030