40809608 has 16 divisors (see below), whose sum is σ = 87449280. Its totient is φ = 17489808.

The previous prime is 40809607. The next prime is 40809647. The reversal of 40809608 is 80690804.

It is a super-2 number, since 2×40809608² = 3330848210227328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40809607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364316 + ... + 364427.

It is an arithmetic number, because the mean of its divisors is an integer number (5465580).

Almost surely, 2^40809608 is an apocalyptic number.

It is an amenable number.

40809608 is an abundant number, since it is smaller than the sum of its proper divisors (46639672).

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

40809608 is a wasteful number, since it uses less digits than its factorization.

40809608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728756 (or 728752 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 40809608 is about 6388.2398201696. The cubic root of 40809608 is about 344.2871453190.

The spelling of 40809608 in words is "forty million, eight hundred nine thousand, six hundred eight".