813850840 has 48 divisors (see below), whose sum is σ = 2012779440. Its totient is φ = 295944000.

The previous prime is 813850831. The next prime is 813850841. The reversal of 813850840 is 48058318.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 813850840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813850841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79236 + ... + 88915.

It is an arithmetic number, because the mean of its divisors is an integer number (41932905).

Almost surely, 2^813850840 is an apocalyptic number.

It is an amenable number.

813850840 is an abundant number, since it is smaller than the sum of its proper divisors (1198928600).

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

813850840 is a wasteful number, since it uses less digits than its factorization.

813850840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168184 (or 168169 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 813850840 is about 28528.0710879653. The cubic root of 813850840 is about 933.6446336869.

The spelling of 813850840 in words is "eight hundred thirteen million, eight hundred fifty thousand, eight hundred forty".