840408264 has 64 divisors (see below), whose sum is σ = 2409792000. Its totient is φ = 271097280.

The previous prime is 840408259. The next prime is 840408287. The reversal of 840408264 is 462804048.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56059 + ... + 69450.

It is an arithmetic number, because the mean of its divisors is an integer number (37653000).

Almost surely, 2^840408264 is an apocalyptic number.

It is an amenable number.

840408264 is an abundant number, since it is smaller than the sum of its proper divisors (1569383736).

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

840408264 is a wasteful number, since it uses less digits than its factorization.

840408264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125555 (or 125545 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 840408264 is about 28989.7958599228. The cubic root of 840408264 is about 943.6916335759.

The spelling of 840408264 in words is "eight hundred forty million, four hundred eight thousand, two hundred sixty-four".