256077320 has 16 divisors (see below), whose sum is σ = 576174060. Its totient is φ = 102430912.

The previous prime is 256077317. The next prime is 256077343. The reversal of 256077320 is 23770652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 253637476 + 2439844 = 15926^2 + 1562^2 .

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 3 ways as a sum of consecutive naturals, for example, 3200927 + ... + 3201006.

Almost surely, 2^256077320 is an apocalyptic number.

256077320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256077320 is an abundant number, since it is smaller than the sum of its proper divisors (320096740).

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

256077320 is a wasteful number, since it uses less digits than its factorization.

256077320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401944 (or 6401940 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 256077320 is about 16002.4160675818. The cubic root of 256077320 is about 635.0243403157.

The spelling of 256077320 in words is "two hundred fifty-six million, seventy-seven thousand, three hundred twenty".