172764640 has 24 divisors (see below), whose sum is σ = 408156840. Its totient is φ = 69105792.

The previous prime is 172764619. The next prime is 172764677. The reversal of 172764640 is 46467271.

It is a self number, because there is not a number n which added to its sum of digits gives 172764640.

It is a congruent number.

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, 539730 + ... + 540049.

It is an arithmetic number, because the mean of its divisors is an integer number (17006535).

Almost surely, 2^172764640 is an apocalyptic number.

172764640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172764640 is an abundant number, since it is smaller than the sum of its proper divisors (235392200).

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

172764640 is a wasteful number, since it uses less digits than its factorization.

172764640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079794 (or 1079786 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 172764640 is about 13143.9963481431. The cubic root of 172764640 is about 556.9526651776.

The spelling of 172764640 in words is "one hundred seventy-two million, seven hundred sixty-four thousand, six hundred forty".