40409908 has 36 divisors (see below), whose sum is σ = 89746272. Its totient is φ = 15743280.

The previous prime is 40409891. The next prime is 40409917. The reversal of 40409908 is 80990404.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 7216 + ... + 11527.

It is an arithmetic number, because the mean of its divisors is an integer number (2492952).

Almost surely, 2^40409908 is an apocalyptic number.

It is an amenable number.

40409908 is an abundant number, since it is smaller than the sum of its proper divisors (49336364).

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

40409908 is a wasteful number, since it uses less digits than its factorization.

40409908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18772 (or 18763 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 40409908 is about 6356.8787938736. The cubic root of 40409908 is about 343.1594427399.

The spelling of 40409908 in words is "forty million, four hundred nine thousand, nine hundred eight".