40011890808 has 32 divisors (see below), whose sum is σ = 101917083600. Its totient is φ = 13085649408.

The previous prime is 40011890797. The next prime is 40011890813. The reversal of 40011890808 is 80809811004.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 15726673 + ... + 15729216.

Almost surely, 2^40011890808 is an apocalyptic number.

It is an amenable number.

40011890808 is an abundant number, since it is smaller than the sum of its proper divisors (61905192792).

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

40011890808 is a wasteful number, since it uses less digits than its factorization.

40011890808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31455951 (or 31455947 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The spelling of 40011890808 in words is "forty billion, eleven million, eight hundred ninety thousand, eight hundred eight".