56172816 has 180 divisors, whose sum is σ = 192956400. Its totient is φ = 15168384.

The previous prime is 56172799. The next prime is 56172821. The reversal of 56172816 is 61827165.

56172816 is a `hidden beast` number, since 5 + 617 + 28 + 16 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 133855 + ... + 134273.

It is an arithmetic number, because the mean of its divisors is an integer number (1071980).

Almost surely, 2^56172816 is an apocalyptic number.

56172816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56172816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96478200).

56172816 is an abundant number, since it is smaller than the sum of its proper divisors (136783584).

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

56172816 is a wasteful number, since it uses less digits than its factorization.

56172816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 450 counting only the distinct ones).

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

The square root of 56172816 is about 7494.8526336413. The cubic root of 56172816 is about 382.9793861202.

The spelling of 56172816 in words is "fifty-six million, one hundred seventy-two thousand, eight hundred sixteen".