840445968 has 40 divisors (see below), whose sum is σ = 2180915968. Its totient is φ = 278888832.

The previous prime is 840445939. The next prime is 840445979. The reversal of 840445968 is 869544048.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28555 + ... + 49962.

Almost surely, 2^840445968 is an apocalyptic number.

It is an amenable number.

840445968 is an abundant number, since it is smaller than the sum of its proper divisors (1340470000).

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

840445968 is a wasteful number, since it uses less digits than its factorization.

840445968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78751 (or 78745 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 840445968 is about 28990.4461504131. The cubic root of 840445968 is about 943.7057459301.

The spelling of 840445968 in words is "eight hundred forty million, four hundred forty-five thousand, nine hundred sixty-eight".