840364392 has 64 divisors (see below), whose sum is σ = 2403532800. Its totient is φ = 239855040.

The previous prime is 840364381. The next prime is 840364397. The reversal of 840364392 is 293463048.

It is a super-2 number, since 2×840364392² = 1412424622683059328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 840364392.

It is not an unprimeable number, because it can be changed into a prime (840364397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212917 + ... + 216827.

It is an arithmetic number, because the mean of its divisors is an integer number (37555200).

Almost surely, 2^840364392 is an apocalyptic number.

It is an amenable number.

840364392 is an abundant number, since it is smaller than the sum of its proper divisors (1563168408).

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

840364392 is a wasteful number, since it uses less digits than its factorization.

840364392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206 (or 5202 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 840364392 is about 28989.0391700035. The cubic root of 840364392 is about 943.6752120494.

The spelling of 840364392 in words is "eight hundred forty million, three hundred sixty-four thousand, three hundred ninety-two".