40040404400 has 60 divisors (see below), whose sum is σ = 99514240800. Its totient is φ = 15463875840.

The previous prime is 40040404363. The next prime is 40040404451. The reversal of 40040404400 is 440404004.

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

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, 1714280 + ... + 1737479.

It is an arithmetic number, because the mean of its divisors is an integer number (1658570680).

Almost surely, 2^40040404400 is an apocalyptic number.

40040404400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040404400 is an abundant number, since it is smaller than the sum of its proper divisors (59473836400).

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

40040404400 is a wasteful number, since it uses less digits than its factorization.

40040404400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451806 (or 3451795 counting only the distinct ones).

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

Adding to 40040404400 its reverse (440404004), we get a palindrome (40480808404).

The spelling of 40040404400 in words is "forty billion, forty million, four hundred four thousand, four hundred".