172157076 has 120 divisors (see below), whose sum is σ = 554005760. Its totient is φ = 45396288.

The previous prime is 172157059. The next prime is 172157087. The reversal of 172157076 is 670751271.

172157076 is a `hidden beast` number, since 17 + 2 + 1 + 570 + 76 = 666.

172157076 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 172157076.

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 39 ways as a sum of consecutive naturals, for example, 26565 + ... + 32403.

Almost surely, 2^172157076 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172157076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277002880).

172157076 is an abundant number, since it is smaller than the sum of its proper divisors (381848684).

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

172157076 is a wasteful number, since it uses less digits than its factorization.

172157076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875 (or 5864 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 36.

The square root of 172157076 is about 13120.8641483707. The cubic root of 172157076 is about 556.2990170835.

The spelling of 172157076 in words is "one hundred seventy-two million, one hundred fifty-seven thousand, seventy-six".