172180090 has 16 divisors (see below), whose sum is σ = 326236320. Its totient is φ = 65247120.

The previous prime is 172180087. The next prime is 172180103. The reversal of 172180090 is 90081271.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452916 + ... + 453295.

It is an arithmetic number, because the mean of its divisors is an integer number (20389770).

Almost surely, 2^172180090 is an apocalyptic number.

172180090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172180090 is a deficient number, since it is larger than the sum of its proper divisors (154056230).

172180090 is a wasteful number, since it uses less digits than its factorization.

172180090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906237.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 172180090 is about 13121.7411192265. The cubic root of 172180090 is about 556.3238047085.

The spelling of 172180090 in words is "one hundred seventy-two million, one hundred eighty thousand, ninety".