39996556 has 24 divisors (see below), whose sum is σ = 73256400. Its totient is φ = 19086912.

The previous prime is 39996553. The next prime is 39996557. The reversal of 39996556 is 65569993.

It is a super-2 number, since 2×39996556² = 3199448983722272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39996553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5295 + ... + 10393.

It is an arithmetic number, because the mean of its divisors is an integer number (3052350).

Almost surely, 2^39996556 is an apocalyptic number.

It is an amenable number.

39996556 is a deficient number, since it is larger than the sum of its proper divisors (33259844).

39996556 is a wasteful number, since it uses less digits than its factorization.

39996556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5193 (or 5191 counting only the distinct ones).

The product of its digits is 1968300, while the sum is 52.

The square root of 39996556 is about 6324.2830423693. The cubic root of 39996556 is about 341.9853737917.

The spelling of 39996556 in words is "thirty-nine million, nine hundred ninety-six thousand, five hundred fifty-six".