12655790 has 16 divisors (see below), whose sum is σ = 26034912. Its totient is φ = 4339104.

The previous prime is 12655789. The next prime is 12655801. The reversal of 12655790 is 9755621.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 12655790.

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 7 ways as a sum of consecutive naturals, for example, 90329 + ... + 90468.

It is an arithmetic number, because the mean of its divisors is an integer number (1627182).

Almost surely, 2^12655790 is an apocalyptic number.

12655790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12655790 is an abundant number, since it is smaller than the sum of its proper divisors (13379122).

12655790 is a wasteful number, since it uses less digits than its factorization.

12655790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180811.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 12655790 is about 3557.4977160920. The cubic root of 12655790 is about 233.0396145505.

The spelling of 12655790 in words is "twelve million, six hundred fifty-five thousand, seven hundred ninety".