172618240 has 40 divisors (see below), whose sum is σ = 413885340. Its totient is φ = 69046272.

The previous prime is 172618231. The next prime is 172618309. The reversal of 172618240 is 42816271.

It can be written as a sum of positive squares in 2 ways, for example, as 142850304 + 29767936 = 11952^2 + 5456^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 31155 + ... + 36274.

Almost surely, 2^172618240 is an apocalyptic number.

172618240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172618240 is an abundant number, since it is smaller than the sum of its proper divisors (241267100).

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

172618240 is an frugal number, since it uses more digits than its factorization.

172618240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67452 (or 67436 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 172618240 is about 13138.4260853422. The cubic root of 172618240 is about 556.7953009688.

The spelling of 172618240 in words is "one hundred seventy-two million, six hundred eighteen thousand, two hundred forty".