39981016 has 32 divisors (see below), whose sum is σ = 81054000. Its totient is φ = 18423936.

The previous prime is 39980999. The next prime is 39981043. The reversal of 39981016 is 61018993.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2070 + ... + 9178.

Almost surely, 2^39981016 is an apocalyptic number.

It is an amenable number.

39981016 is an abundant number, since it is smaller than the sum of its proper divisors (41072984).

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

39981016 is a wasteful number, since it uses less digits than its factorization.

39981016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7171 (or 7167 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 39981016 is about 6323.0543252450. The cubic root of 39981016 is about 341.9410771349.

The spelling of 39981016 in words is "thirty-nine million, nine hundred eighty-one thousand, sixteen".