256030520 has 16 divisors (see below), whose sum is σ = 576068760. Its totient is φ = 102412192.

The previous prime is 256030513. The next prime is 256030553. The reversal of 256030520 is 25030652.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3200342 + ... + 3200421.

Almost surely, 2^256030520 is an apocalyptic number.

256030520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256030520 is an abundant number, since it is smaller than the sum of its proper divisors (320038240).

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

256030520 is a wasteful number, since it uses less digits than its factorization.

256030520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400774 (or 6400770 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 256030520 is about 16000.9537215755. The cubic root of 256030520 is about 634.9856528472.

The spelling of 256030520 in words is "two hundred fifty-six million, thirty thousand, five hundred twenty".