256272720 has 80 divisors (see below), whose sum is σ = 866676672. Its totient is φ = 62126080.

The previous prime is 256272719. The next prime is 256272763. The reversal of 256272720 is 27272652.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 45897 + ... + 51176.

Almost surely, 2^256272720 is an apocalyptic number.

256272720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256272720 is an abundant number, since it is smaller than the sum of its proper divisors (610403952).

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

256272720 is a wasteful number, since it uses less digits than its factorization.

256272720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97100 (or 97094 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 256272720 is about 16008.5202314268. The cubic root of 256272720 is about 635.1858178579.

The spelling of 256272720 in words is "two hundred fifty-six million, two hundred seventy-two thousand, seven hundred twenty".