400636242 has 24 divisors (see below), whose sum is σ = 913732560. Its totient is φ = 126516600.

The previous prime is 400636237. The next prime is 400636253. The reversal of 400636242 is 242636004.

400636242 is a `hidden beast` number, since 4 + 0 + 0 + 636 + 24 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 585384 + ... + 586067.

It is an arithmetic number, because the mean of its divisors is an integer number (38072190).

Almost surely, 2^400636242 is an apocalyptic number.

400636242 is an abundant number, since it is smaller than the sum of its proper divisors (513096318).

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

400636242 is a wasteful number, since it uses less digits than its factorization.

400636242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171478 (or 1171475 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 400636242 is about 20015.8997299647. The cubic root of 400636242 is about 737.1967487126.

The spelling of 400636242 in words is "four hundred million, six hundred thirty-six thousand, two hundred forty-two".