40404004432 has 30 divisors (see below), whose sum is σ = 86046342074. Its totient is φ = 18365455680.

The previous prime is 40404004429. The next prime is 40404004441. The reversal of 40404004432 is 23440040404.

It can be written as a sum of positive squares in only one way, i.e., 39360972816 + 1043031616 = 198396^2 + 32296^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40404004397 and 40404004406.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 10432983 + ... + 10436854.

Almost surely, 2^40404004432 is an apocalyptic number.

It is an amenable number.

40404004432 is an abundant number, since it is smaller than the sum of its proper divisors (45642337642).

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

40404004432 is a wasteful number, since it uses less digits than its factorization.

40404004432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20869867 (or 20869850 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 40404004432 its reverse (23440040404), we get a palindrome (63844044836).

The spelling of 40404004432 in words is "forty billion, four hundred four million, four thousand, four hundred thirty-two".