39873564 has 36 divisors (see below), whose sum is σ = 104045760. Its totient is φ = 12862080.

The previous prime is 39873553. The next prime is 39873569. The reversal of 39873564 is 46537893.

39873564 is a `hidden beast` number, since 3 + 9 + 87 + 3 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×39873564² = 3179802212124192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39873569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16749 + ... + 18980.

It is an arithmetic number, because the mean of its divisors is an integer number (2890160).

Almost surely, 2^39873564 is an apocalyptic number.

It is an amenable number.

39873564 is an abundant number, since it is smaller than the sum of its proper divisors (64172196).

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

39873564 is a wasteful number, since it uses less digits than its factorization.

39873564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35770 (or 35765 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 39873564 is about 6314.5517655650. The cubic root of 39873564 is about 341.6344714723.

The spelling of 39873564 in words is "thirty-nine million, eight hundred seventy-three thousand, five hundred sixty-four".