400404036746 has 24 divisors (see below), whose sum is σ = 699115493700. Its totient is φ = 171490882752.

The previous prime is 400404036733. The next prime is 400404036793. The reversal of 400404036746 is 647630404004.

It can be written as a sum of positive squares in 2 ways, for example, as 398445000625 + 1959036121 = 631225^2 + 44261^2 .

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, 1167035 + ... + 1470638.

Almost surely, 2^400404036746 is an apocalyptic number.

400404036746 is a deficient number, since it is larger than the sum of its proper divisors (298711456954).

400404036746 is a wasteful number, since it uses less digits than its factorization.

400404036746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639238 (or 2639231 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 38.

The spelling of 400404036746 in words is "four hundred billion, four hundred four million, thirty-six thousand, seven hundred forty-six".