172872580 has 24 divisors (see below), whose sum is σ = 370758528. Its totient is φ = 67677408.

The previous prime is 172872563. The next prime is 172872611. The reversal of 172872580 is 85278271.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91014 + ... + 92893.

It is an arithmetic number, because the mean of its divisors is an integer number (15448272).

Almost surely, 2^172872580 is an apocalyptic number.

172872580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172872580 is an abundant number, since it is smaller than the sum of its proper divisors (197885948).

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

172872580 is a wasteful number, since it uses less digits than its factorization.

172872580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183963 (or 183961 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 172872580 is about 13148.1017641331. The cubic root of 172872580 is about 557.0686321080.

The spelling of 172872580 in words is "one hundred seventy-two million, eight hundred seventy-two thousand, five hundred eighty".