172982820 has 48 divisors (see below), whose sum is σ = 512846208. Its totient is φ = 43415040.

The previous prime is 172982729. The next prime is 172982833. The reversal of 172982820 is 28289271.

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, 83776 + ... + 85815.

It is an arithmetic number, because the mean of its divisors is an integer number (10684296).

Almost surely, 2^172982820 is an apocalyptic number.

172982820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172982820 is an abundant number, since it is smaller than the sum of its proper divisors (339863388).

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

172982820 is a wasteful number, since it uses less digits than its factorization.

172982820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169620 (or 169618 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 172982820 is about 13152.2933361448. The cubic root of 172982820 is about 557.1870202618.

The spelling of 172982820 in words is "one hundred seventy-two million, nine hundred eighty-two thousand, eight hundred twenty".