172890316 has 6 divisors (see below), whose sum is σ = 302558060. Its totient is φ = 86445156.

The previous prime is 172890313. The next prime is 172890331. The reversal of 172890316 is 613098271.

It is a super-2 number, since 2×172890316² = 59782122733159712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172890313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21611286 + ... + 21611293.

Almost surely, 2^172890316 is an apocalyptic number.

It is an amenable number.

172890316 is a deficient number, since it is larger than the sum of its proper divisors (129667744).

172890316 is a wasteful number, since it uses less digits than its factorization.

172890316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43222583 (or 43222581 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 172890316 is about 13148.7762168196. The cubic root of 172890316 is about 557.0876824232.

The spelling of 172890316 in words is "one hundred seventy-two million, eight hundred ninety thousand, three hundred sixteen".