40404000400 has 60 divisors (see below), whose sum is σ = 97383034944. Its totient is φ = 16109584000.

The previous prime is 40404000359. The next prime is 40404000409. The reversal of 40404000400 is 400040404.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (40404000409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37996 + ... + 286795.

Almost surely, 2^40404000400 is an apocalyptic number.

40404000400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40404000400 is an abundant number, since it is smaller than the sum of its proper divisors (56979034544).

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

40404000400 is a wasteful number, since it uses less digits than its factorization.

40404000400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325120 (or 325109 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 40404000400 its reverse (400040404), we get a palindrome (40804040804).

The spelling of 40404000400 in words is "forty billion, four hundred four million, four hundred", and thus it is an aban number.