813082578 has 48 divisors (see below), whose sum is σ = 2063638944. Its totient is φ = 211189440.

The previous prime is 813082553. The next prime is 813082583. The reversal of 813082578 is 875280318.

It is a happy number.

It is a super-2 number, since 2×813082578² = 1322206557294252168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122475 + ... + 128942.

It is an arithmetic number, because the mean of its divisors is an integer number (42992478).

Almost surely, 2^813082578 is an apocalyptic number.

813082578 is an abundant number, since it is smaller than the sum of its proper divisors (1250556366).

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

813082578 is a wasteful number, since it uses less digits than its factorization.

813082578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251447 (or 251440 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 813082578 is about 28514.6028904490. The cubic root of 813082578 is about 933.3507593969.

The spelling of 813082578 in words is "eight hundred thirteen million, eighty-two thousand, five hundred seventy-eight".