39682981 has 32 divisors (see below), whose sum is σ = 48722688. Its totient is φ = 31933440.

The previous prime is 39682969. The next prime is 39682997. The reversal of 39682981 is 18928693.

39682981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 39682981 - 2²¹ = 37585829 is a prime.

It is a super-2 number, since 2×39682981² = 3149477962092722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39682081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187966 + ... + 188176.

It is an arithmetic number, because the mean of its divisors is an integer number (1522584).

Almost surely, 2^39682981 is an apocalyptic number.

It is an amenable number.

39682981 is a deficient number, since it is larger than the sum of its proper divisors (9039707).

39682981 is a wasteful number, since it uses less digits than its factorization.

39682981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301.

The product of its digits is 186624, while the sum is 46.

The square root of 39682981 is about 6299.4429118772. The cubic root of 39682981 is about 341.0893004627.

The spelling of 39682981 in words is "thirty-nine million, six hundred eighty-two thousand, nine hundred eighty-one".