172239040 has 28 divisors (see below), whose sum is σ = 410144976. Its totient is φ = 68895488.

The previous prime is 172239017. The next prime is 172239043. The reversal of 172239040 is 40932271.

It is not an unprimeable number, because it can be changed into a prime (172239043) 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, 268804 + ... + 269443.

Almost surely, 2^172239040 is an apocalyptic number.

172239040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172239040 is an abundant number, since it is smaller than the sum of its proper divisors (237905936).

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

172239040 is an equidigital number, since it uses as much as digits as its factorization.

172239040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538264 (or 538254 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 172239040 is about 13123.9871990184. The cubic root of 172239040 is about 556.3872877478.

The spelling of 172239040 in words is "one hundred seventy-two million, two hundred thirty-nine thousand, forty".