172804780 has 24 divisors (see below), whose sum is σ = 364618800. Its totient is φ = 68792640.

The previous prime is 172804777. The next prime is 172804783. The reversal of 172804780 is 87408271.

It is an interprime number because it is at equal distance from previous prime (172804777) and next prime (172804783).

It is a super-2 number, since 2×172804780² = 59722983981696800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (172804783) by changing a digit.

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, 16255 + ... + 24694.

It is an arithmetic number, because the mean of its divisors is an integer number (15192450).

Almost surely, 2^172804780 is an apocalyptic number.

172804780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172804780 is an abundant number, since it is smaller than the sum of its proper divisors (191814020).

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

172804780 is a wasteful number, since it uses less digits than its factorization.

172804780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41169 (or 41167 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 172804780 is about 13145.5231923267. The cubic root of 172804780 is about 556.9957958183.

The spelling of 172804780 in words is "one hundred seventy-two million, eight hundred four thousand, seven hundred eighty".