40020000408 has 48 divisors (see below), whose sum is σ = 109167294600. Its totient is φ = 13244025600.

The previous prime is 40020000389. The next prime is 40020000439. The reversal of 40020000408 is 80400002004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1989393 + ... + 2009408.

Almost surely, 2^40020000408 is an apocalyptic number.

It is an amenable number.

40020000408 is an abundant number, since it is smaller than the sum of its proper divisors (69147294192).

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

40020000408 is a wasteful number, since it uses less digits than its factorization.

40020000408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998952 (or 3998945 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The spelling of 40020000408 in words is "forty billion, twenty million, four hundred eight", and thus it is an aban number.