172936256 has 56 divisors (see below), whose sum is σ = 351723960. Its totient is φ = 84344832.

The previous prime is 172936249. The next prime is 172936273. The reversal of 172936256 is 652639271.

It can be written as a sum of positive squares in 4 ways, for example, as 3936256 + 169000000 = 1984^2 + 13000^2 .

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 7 ways as a sum of consecutive naturals, for example, 552356 + ... + 552668.

It is an arithmetic number, because the mean of its divisors is an integer number (6280785).

Almost surely, 2^172936256 is an apocalyptic number.

172936256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172936256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175861980).

172936256 is an abundant number, since it is smaller than the sum of its proper divisors (178787704).

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

172936256 is an equidigital number, since it uses as much as digits as its factorization.

172936256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 501 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 172936256 is about 13150.5230314235. The cubic root of 172936256 is about 557.1370207209.

The spelling of 172936256 in words is "one hundred seventy-two million, nine hundred thirty-six thousand, two hundred fifty-six".