172266560 has 28 divisors (see below), whose sum is σ = 410210508. Its totient is φ = 68906496.

The previous prime is 172266553. The next prime is 172266587. The reversal of 172266560 is 65662271.

It can be written as a sum of positive squares in 2 ways, for example, as 39740416 + 132526144 = 6304^2 + 11512^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 172266560.

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, 268847 + ... + 269486.

Almost surely, 2^172266560 is an apocalyptic number.

172266560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172266560 is an abundant number, since it is smaller than the sum of its proper divisors (237943948).

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

172266560 is an equidigital number, since it uses as much as digits as its factorization.

172266560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538350 (or 538340 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 172266560 is about 13125.0356189993. The cubic root of 172266560 is about 556.4169189757.

The spelling of 172266560 in words is "one hundred seventy-two million, two hundred sixty-six thousand, five hundred sixty".