172316738 has 32 divisors (see below), whose sum is σ = 303747840. Its totient is φ = 72470160.

The previous prime is 172316731. The next prime is 172316741. The reversal of 172316738 is 837613271.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (172316731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13181 + ... + 22767.

It is an arithmetic number, because the mean of its divisors is an integer number (9492120).

Almost surely, 2^172316738 is an apocalyptic number.

172316738 is a deficient number, since it is larger than the sum of its proper divisors (131431102).

172316738 is a wasteful number, since it uses less digits than its factorization.

172316738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9662.

The product of its digits is 42336, while the sum is 38.

The square root of 172316738 is about 13126.9470174904. The cubic root of 172316738 is about 556.4709383159.

The spelling of 172316738 in words is "one hundred seventy-two million, three hundred sixteen thousand, seven hundred thirty-eight".