400400440808 has 16 divisors (see below), whose sum is σ = 776638786500. Its totient is φ = 193296764416.

The previous prime is 400400440793. The next prime is 400400440813. The reversal of 400400440808 is 808044004004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 390772513924 + 9627926884 = 625118^2 + 98122^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862931753 + ... + 862932216.

Almost surely, 2^400400440808 is an apocalyptic number.

It is an amenable number.

400400440808 is a deficient number, since it is larger than the sum of its proper divisors (376238345692).

400400440808 is a wasteful number, since it uses less digits than its factorization.

400400440808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725864004 (or 1725864000 counting only the distinct ones).

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

The spelling of 400400440808 in words is "four hundred billion, four hundred million, four hundred forty thousand, eight hundred eight".