39845988 has 72 divisors (see below), whose sum is σ = 123975488. Its totient is φ = 10507968.

The previous prime is 39845987. The next prime is 39846019. The reversal of 39845988 is 88954893.

It is a happy number.

It is a super-2 number, since 2×39845988² = 3175405519392288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39845987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2806 + ... + 9357.

Almost surely, 2^39845988 is an apocalyptic number.

It is an amenable number.

39845988 is an abundant number, since it is smaller than the sum of its proper divisors (84129500).

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

39845988 is a wasteful number, since it uses less digits than its factorization.

39845988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12193 (or 12188 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 39845988 is about 6312.3678600031. The cubic root of 39845988 is about 341.5556967665. Note that the first 3 decimals are identical.

The spelling of 39845988 in words is "thirty-nine million, eight hundred forty-five thousand, nine hundred eighty-eight".