172157038 has 16 divisors (see below), whose sum is σ = 263606400. Its totient is φ = 84294496.

The previous prime is 172157033. The next prime is 172157039. The reversal of 172157038 is 830751271.

It is a junction number, because it is equal to n+sod(n) for n = 172156994 and 172157012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172157033) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 70563 + ... + 72961.

It is an arithmetic number, because the mean of its divisors is an integer number (16475400).

Almost surely, 2^172157038 is an apocalyptic number.

172157038 is a deficient number, since it is larger than the sum of its proper divisors (91449362).

172157038 is a wasteful number, since it uses less digits than its factorization.

172157038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 172157038 is about 13120.8627002953. The cubic root of 172157038 is about 556.2989761531.

The spelling of 172157038 in words is "one hundred seventy-two million, one hundred fifty-seven thousand, thirty-eight".