400484538 has 24 divisors (see below), whose sum is σ = 918759348. Its totient is φ = 125642112.

The previous prime is 400484479. The next prime is 400484551. The reversal of 400484538 is 835484004.

400484538 is a `hidden beast` number, since 40 + 0 + 4 + 84 + 538 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 384826689 + 15657849 = 19617^2 + 3957^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 654081 + ... + 654692.

Almost surely, 2^400484538 is an apocalyptic number.

400484538 is an abundant number, since it is smaller than the sum of its proper divisors (518274810).

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

400484538 is a wasteful number, since it uses less digits than its factorization.

400484538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308798 (or 1308795 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 400484538 is about 20012.1097838284. The cubic root of 400484538 is about 737.1036885559.

The spelling of 400484538 in words is "four hundred million, four hundred eighty-four thousand, five hundred thirty-eight".