400444808 has 8 divisors (see below), whose sum is σ = 750834030. Its totient is φ = 200222400.

The previous prime is 400444799. The next prime is 400444829. The reversal of 400444808 is 808444004.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 221473924 + 178970884 = 14882^2 + 13378^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25027793 + ... + 25027808.

Almost surely, 2^400444808 is an apocalyptic number.

It is an amenable number.

400444808 is a deficient number, since it is larger than the sum of its proper divisors (350389222).

400444808 is a wasteful number, since it uses less digits than its factorization.

400444808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50055607 (or 50055603 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 400444808 is about 20011.1171102465. The cubic root of 400444808 is about 737.0793130015.

The spelling of 400444808 in words is "four hundred million, four hundred forty-four thousand, eight hundred eight".