172364820 has 48 divisors (see below), whose sum is σ = 494399808. Its totient is φ = 44842240.

The previous prime is 172364809. The next prime is 172364831. The reversal of 172364820 is 28463271.

It is an interprime number because it is at equal distance from previous prime (172364809) and next prime (172364831).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32574 + ... + 37493.

It is an arithmetic number, because the mean of its divisors is an integer number (10299996).

Almost surely, 2^172364820 is an apocalyptic number.

172364820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172364820 is an abundant number, since it is smaller than the sum of its proper divisors (322034988).

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

172364820 is a wasteful number, since it uses less digits than its factorization.

172364820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70120 (or 70118 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 172364820 is about 13128.7783133085. The cubic root of 172364820 is about 556.5226913604.

The spelling of 172364820 in words is "one hundred seventy-two million, three hundred sixty-four thousand, eight hundred twenty".