172644460 has 12 divisors (see below), whose sum is σ = 362553408. Its totient is φ = 69057776.

The previous prime is 172644449. The next prime is 172644473. The reversal of 172644460 is 64446271.

It is a super-2 number, since 2×172644460² = 59612219137383200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4316092 + ... + 4316131.

It is an arithmetic number, because the mean of its divisors is an integer number (30212784).

Almost surely, 2^172644460 is an apocalyptic number.

172644460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172644460 is an abundant number, since it is smaller than the sum of its proper divisors (189908948).

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

172644460 is a wasteful number, since it uses less digits than its factorization.

172644460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8632232 (or 8632230 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 172644460 is about 13139.4238838695. The cubic root of 172644460 is about 556.8234911795.

The spelling of 172644460 in words is "one hundred seventy-two million, six hundred forty-four thousand, four hundred sixty".