39961608 has 16 divisors (see below), whose sum is σ = 99904080. Its totient is φ = 13320528.

The previous prime is 39961589. The next prime is 39961619. The reversal of 39961608 is 80616993.

It is a super-2 number, since 2×39961608² = 3193860227891328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39961608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832510 + ... + 832557.

It is an arithmetic number, because the mean of its divisors is an integer number (6244005).

Almost surely, 2^39961608 is an apocalyptic number.

It is an amenable number.

39961608 is an abundant number, since it is smaller than the sum of its proper divisors (59942472).

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

39961608 is a wasteful number, since it uses less digits than its factorization.

39961608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665076 (or 1665072 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 39961608 is about 6321.5194376036. The cubic root of 39961608 is about 341.8857386500.

The spelling of 39961608 in words is "thirty-nine million, nine hundred sixty-one thousand, six hundred eight".