12655830 has 32 divisors (see below), whose sum is σ = 33136128. Its totient is φ = 3068000.

The previous prime is 12655829. The next prime is 12655849. The reversal of 12655830 is 3855621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18846 + ... + 19505.

It is an arithmetic number, because the mean of its divisors is an integer number (1035504).

Almost surely, 2^12655830 is an apocalyptic number.

12655830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12655830 is an abundant number, since it is smaller than the sum of its proper divisors (20480298).

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

12655830 is a wasteful number, since it uses less digits than its factorization.

12655830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38372.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 12655830 is about 3557.5033380167. The cubic root of 12655830 is about 233.0398600659.

The spelling of 12655830 in words is "twelve million, six hundred fifty-five thousand, eight hundred thirty".