40404036402 has 12 divisors (see below), whose sum is σ = 87542078910. Its totient is φ = 13468012128.

The previous prime is 40404036383. The next prime is 40404036437. The reversal of 40404036402 is 20463040404.

It can be written as a sum of positive squares in only one way, i.e., 39767937561 + 636098841 = 199419^2 + 25221^2 .

It is a super-2 number, since 2×40404036402² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122334327 + ... + 1122334362.

Almost surely, 2^40404036402 is an apocalyptic number.

40404036402 is an abundant number, since it is smaller than the sum of its proper divisors (47138042508).

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

40404036402 is a wasteful number, since it uses less digits than its factorization.

40404036402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244668697 (or 2244668694 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 40404036402 its reverse (20463040404), we get a palindrome (60867076806).

The spelling of 40404036402 in words is "forty billion, four hundred four million, thirty-six thousand, four hundred two".