172680864 has 24 divisors (see below), whose sum is σ = 453287520. Its totient is φ = 57560256.

The previous prime is 172680863. The next prime is 172680899. The reversal of 172680864 is 468086271.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (172680863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 899284 + ... + 899475.

It is an arithmetic number, because the mean of its divisors is an integer number (18886980).

Almost surely, 2^172680864 is an apocalyptic number.

It is an amenable number.

172680864 is an abundant number, since it is smaller than the sum of its proper divisors (280606656).

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

172680864 is a wasteful number, since it uses less digits than its factorization.

172680864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798772 (or 1798764 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 172680864 is about 13140.8091075093. The cubic root of 172680864 is about 556.8626258995.

The spelling of 172680864 in words is "one hundred seventy-two million, six hundred eighty thousand, eight hundred sixty-four".