172640264 has 16 divisors (see below), whose sum is σ = 324963900. Its totient is φ = 85983232.

The previous prime is 172640243. The next prime is 172640267. The reversal of 172640264 is 462046271.

It can be written as a sum of positive squares in 2 ways, for example, as 120077764 + 52562500 = 10958^2 + 7250^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 172640264.

It is not an unprimeable number, because it can be changed into a prime (172640267) 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, 39929 + ... + 44040.

Almost surely, 2^172640264 is an apocalyptic number.

It is an amenable number.

172640264 is a deficient number, since it is larger than the sum of its proper divisors (152323636).

172640264 is a wasteful number, since it uses less digits than its factorization.

172640264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84232 (or 84228 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 172640264 is about 13139.2642107540. The cubic root of 172640264 is about 556.8189800776.

The spelling of 172640264 in words is "one hundred seventy-two million, six hundred forty thousand, two hundred sixty-four".