813239850 has 24 divisors (see below), whose sum is σ = 2016835200. Its totient is φ = 216863920.

The previous prime is 813239849. The next prime is 813239851. The reversal of 813239850 is 58932318.

It is an interprime number because it is at equal distance from previous prime (813239849) and next prime (813239851).

It is a super-2 number, since 2×813239850² = 1322718107256045000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813239799 and 813239808.

It is not an unprimeable number, because it can be changed into a prime (813239851) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2710650 + ... + 2710949.

It is an arithmetic number, because the mean of its divisors is an integer number (84034800).

Almost surely, 2^813239850 is an apocalyptic number.

813239850 is an abundant number, since it is smaller than the sum of its proper divisors (1203595350).

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

813239850 is a wasteful number, since it uses less digits than its factorization.

813239850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421614 (or 5421609 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 813239850 is about 28517.3605019819. The cubic root of 813239850 is about 933.4109338823.

The spelling of 813239850 in words is "eight hundred thirteen million, two hundred thirty-nine thousand, eight hundred fifty".