439978842 has 24 divisors (see below), whose sum is σ = 953821440. Its totient is φ = 146577480.

The previous prime is 439978837. The next prime is 439978843. The reversal of 439978842 is 248879934.

439978842 is a `hidden beast` number, since 439 + 97 + 88 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (439978843) 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, 32209 + ... + 43787.

It is an arithmetic number, because the mean of its divisors is an integer number (39742560).

Almost surely, 2^439978842 is an apocalyptic number.

439978842 is an abundant number, since it is smaller than the sum of its proper divisors (513842598).

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

439978842 is a wasteful number, since it uses less digits than its factorization.

439978842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13698 (or 13695 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 439978842 is about 20975.6726233034. The cubic root of 439978842 is about 760.5783006132.

The spelling of 439978842 in words is "four hundred thirty-nine million, nine hundred seventy-eight thousand, eight hundred forty-two".