40404400440 has 32 divisors (see below), whose sum is σ = 121213201680. Its totient is φ = 10774506752.

The previous prime is 40404400397. The next prime is 40404400493. The reversal of 40404400440 is 4400440404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40404400440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168351549 + ... + 168351788.

Almost surely, 2^40404400440 is an apocalyptic number.

40404400440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40404400440 is an abundant number, since it is smaller than the sum of its proper divisors (80808801240).

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

40404400440 is a wasteful number, since it uses less digits than its factorization.

40404400440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336703351 (or 336703347 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 40404400440 its reverse (4400440404), we get a palindrome (44804840844).

The spelling of 40404400440 in words is "forty billion, four hundred four million, four hundred thousand, four hundred forty".