40400404400 has 30 divisors (see below), whose sum is σ = 97061972532. Its totient is φ = 16160161600.

The previous prime is 40400404351. The next prime is 40400404423. The reversal of 40400404400 is 440400404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50500106 + ... + 50500905.

Almost surely, 2^40400404400 is an apocalyptic number.

40400404400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40400404400 is an abundant number, since it is smaller than the sum of its proper divisors (56661568132).

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

40400404400 is a wasteful number, since it uses less digits than its factorization.

40400404400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101001029 (or 101001018 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40400404400 its reverse (440400404), we get a palindrome (40840804804).

The spelling of 40400404400 in words is "forty billion, four hundred million, four hundred four thousand, four hundred".