8408400888440 has 64 divisors (see below), whose sum is σ = 21630476260800. Its totient is φ = 2881697107968.

The previous prime is 8408400888421. The next prime is 8408400888443. The reversal of 8408400888440 is 448880048048.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8408400888443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5478905 + ... + 6843624.

It is an arithmetic number, because the mean of its divisors is an integer number (337976191575).

Almost surely, 2^{8408400888440} is an apocalyptic number.

It is an amenable number.

8408400888440 is an abundant number, since it is smaller than the sum of its proper divisors (13222075372360).

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

8408400888440 is a wasteful number, since it uses less digits than its factorization.

8408400888440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12324984 (or 12324980 counting only the distinct ones).

The product of its (nonzero) digits is 8388608, while the sum is 56.

The spelling of 8408400888440 in words is "eight trillion, four hundred eight billion, four hundred million, eight hundred eighty-eight thousand, four hundred forty".