172820352 has 64 divisors (see below), whose sum is σ = 483235200. Its totient is φ = 54572544.

The previous prime is 172820327. The next prime is 172820353. The reversal of 172820352 is 253028271.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172820353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4548 + ... + 19139.

It is an arithmetic number, because the mean of its divisors is an integer number (7550550).

Almost surely, 2^172820352 is an apocalyptic number.

172820352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172820352 is an abundant number, since it is smaller than the sum of its proper divisors (310414848).

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

172820352 is a wasteful number, since it uses less digits than its factorization.

172820352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23723 (or 23711 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 172820352 is about 13146.1154718799. The cubic root of 172820352 is about 557.0125262158.

The spelling of 172820352 in words is "one hundred seventy-two million, eight hundred twenty thousand, three hundred fifty-two".