39981364 has 6 divisors (see below), whose sum is σ = 69967394. Its totient is φ = 19990680.

The previous prime is 39981353. The next prime is 39981367. The reversal of 39981364 is 46318993.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 19731364 = 4500^2 + 4442^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39981364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39981367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4997667 + ... + 4997674.

Almost surely, 2^39981364 is an apocalyptic number.

It is an amenable number.

39981364 is a deficient number, since it is larger than the sum of its proper divisors (29986030).

39981364 is a wasteful number, since it uses less digits than its factorization.

39981364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9995345 (or 9995343 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 39981364 is about 6323.0818435317. The cubic root of 39981364 is about 341.9420692320.

The spelling of 39981364 in words is "thirty-nine million, nine hundred eighty-one thousand, three hundred sixty-four".