815030256 has 40 divisors (see below), whose sum is σ = 2154465280. Its totient is φ = 265358016.

The previous prime is 815030233. The next prime is 815030257. The reversal of 815030256 is 652030518.

815030256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815030257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195376 + ... + 199503.

It is an arithmetic number, because the mean of its divisors is an integer number (53861632).

Almost surely, 2^815030256 is an apocalyptic number.

815030256 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

815030256 is an abundant number, since it is smaller than the sum of its proper divisors (1339435024).

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

815030256 is a wasteful number, since it uses less digits than its factorization.

815030256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394933 (or 394927 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 815030256 is about 28548.7347530499. The cubic root of 815030256 is about 934.0954222381.

The spelling of 815030256 in words is "eight hundred fifteen million, thirty thousand, two hundred fifty-six".