108172656 has 30 divisors (see below), whose sum is σ = 302733600. Its totient is φ = 36057504.

The previous prime is 108172633. The next prime is 108172663. The reversal of 108172656 is 656271801.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 108172656.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 375456 + ... + 375743.

It is an arithmetic number, because the mean of its divisors is an integer number (10091120).

Almost surely, 2^108172656 is an apocalyptic number.

108172656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

108172656 is an abundant number, since it is smaller than the sum of its proper divisors (194560944).

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

108172656 is a wasteful number, since it uses less digits than its factorization.

108172656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751213 (or 751204 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 108172656 is about 10400.6084437402. The cubic root of 108172656 is about 476.4739529927.

It can be divided in two parts, 1081 and 72656, that added together give a palindrome (73737).

The spelling of 108172656 in words is "one hundred eight million, one hundred seventy-two thousand, six hundred fifty-six".