810878056 has 32 divisors (see below), whose sum is σ = 1543541760. Its totient is φ = 399313152.

The previous prime is 810878027. The next prime is 810878069. The reversal of 810878056 is 650878018.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144601 + ... + 150103.

It is an arithmetic number, because the mean of its divisors is an integer number (48235680).

Almost surely, 2^810878056 is an apocalyptic number.

It is an amenable number.

810878056 is a deficient number, since it is larger than the sum of its proper divisors (732663704).

810878056 is a wasteful number, since it uses less digits than its factorization.

810878056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5785 (or 5781 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 810878056 is about 28475.9206348100. The cubic root of 810878056 is about 932.5064602906.

The spelling of 810878056 in words is "eight hundred ten million, eight hundred seventy-eight thousand, fifty-six".