172079880 has 64 divisors (see below), whose sum is σ = 589991040. Its totient is φ = 39332352.

The previous prime is 172079867. The next prime is 172079893. The reversal of 172079880 is 88970271.

It is an interprime number because it is at equal distance from previous prime (172079867) and next prime (172079893).

It is a super-2 number, since 2×172079880² = 59222970201628800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101589 + ... + 103268.

It is an arithmetic number, because the mean of its divisors is an integer number (9218610).

Almost surely, 2^172079880 is an apocalyptic number.

172079880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172079880 is an abundant number, since it is smaller than the sum of its proper divisors (417911160).

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

172079880 is a wasteful number, since it uses less digits than its factorization.

172079880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204878 (or 204874 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 172079880 is about 13117.9220915509. The cubic root of 172079880 is about 556.2158556662.

The spelling of 172079880 in words is "one hundred seventy-two million, seventy-nine thousand, eight hundred eighty".