840022432 has 24 divisors (see below), whose sum is σ = 1694133252. Its totient is φ = 409766400.

The previous prime is 840022429. The next prime is 840022441. The reversal of 840022432 is 234220048.

It can be written as a sum of positive squares in 2 ways, for example, as 730945296 + 109077136 = 27036^2 + 10444^2 .

It is a junction number, because it is equal to n+sod(n) for n = 840022397 and 840022406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318819 + ... + 321442.

Almost surely, 2^840022432 is an apocalyptic number.

840022432 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

840022432 is an abundant number, since it is smaller than the sum of its proper divisors (854110820).

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

840022432 is a wasteful number, since it uses less digits than its factorization.

840022432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640312 (or 640304 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 840022432 is about 28983.1404785610. The cubic root of 840022432 is about 943.5471949815.

The spelling of 840022432 in words is "eight hundred forty million, twenty-two thousand, four hundred thirty-two".