40393639404 has 72 divisors (see below), whose sum is σ = 103924242240. Its totient is φ = 13225183200.

The previous prime is 40393639369. The next prime is 40393639411. The reversal of 40393639404 is 40493639304.

40393639404 is a `hidden beast` number, since 4 + 0 + 3 + 9 + 3 + 639 + 4 + 0 + 4 = 666.

40393639404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40393639404² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40393639404.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2734719 + ... + 2749449.

Almost surely, 2^40393639404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40393639404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51962121120).

40393639404 is an abundant number, since it is smaller than the sum of its proper divisors (63530602836).

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

40393639404 is a wasteful number, since it uses less digits than its factorization.

40393639404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16091 (or 16086 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 45.

The spelling of 40393639404 in words is "forty billion, three hundred ninety-three million, six hundred thirty-nine thousand, four hundred four".