256064880 has 80 divisors (see below), whose sum is σ = 840508704. Its totient is φ = 64266240.

The previous prime is 256064813. The next prime is 256064891. The reversal of 256064880 is 88460652.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27301 + ... + 35460.

Almost surely, 2^256064880 is an apocalyptic number.

256064880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256064880 is an abundant number, since it is smaller than the sum of its proper divisors (584443824).

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

256064880 is a wasteful number, since it uses less digits than its factorization.

256064880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62794 (or 62788 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 256064880 is about 16002.0273715551. The cubic root of 256064880 is about 635.0140571836.

The spelling of 256064880 in words is "two hundred fifty-six million, sixty-four thousand, eight hundred eighty".