256719120 has 80 divisors (see below), whose sum is σ = 909525120. Its totient is φ = 58678272.

The previous prime is 256719119. The next prime is 256719137. The reversal of 256719120 is 21917652.

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

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, 74725 + ... + 78084.

It is an arithmetic number, because the mean of its divisors is an integer number (11369064).

Almost surely, 2^256719120 is an apocalyptic number.

256719120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256719120 is an abundant number, since it is smaller than the sum of its proper divisors (652806000).

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

256719120 is a wasteful number, since it uses less digits than its factorization.

256719120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152832 (or 152826 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 256719120 is about 16022.4567404627. The cubic root of 256719120 is about 635.5544127828.

The spelling of 256719120 in words is "two hundred fifty-six million, seven hundred nineteen thousand, one hundred twenty".