39968984 has 32 divisors (see below), whose sum is σ = 82987200. Its totient is φ = 17893920.

The previous prime is 39968983. The next prime is 39968987. The reversal of 39968984 is 48986993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39968983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2507 + ... + 9285.

It is an arithmetic number, because the mean of its divisors is an integer number (2593350).

Almost surely, 2^39968984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39968984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41493600).

39968984 is an abundant number, since it is smaller than the sum of its proper divisors (43018216).

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

39968984 is a wasteful number, since it uses less digits than its factorization.

39968984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6863 (or 6859 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 56.

The square root of 39968984 is about 6322.1028147287. The cubic root of 39968984 is about 341.9067721219.

Subtracting 39968984 from its reverse (48986993), we obtain a square (9018009 = 3003²).

The spelling of 39968984 in words is "thirty-nine million, nine hundred sixty-eight thousand, nine hundred eighty-four".