39389664 has 48 divisors (see below), whose sum is σ = 104872320. Its totient is φ = 12942720.

The previous prime is 39389659. The next prime is 39389687. The reversal of 39389664 is 46698393.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 3927 + ... + 9705.

It is an arithmetic number, because the mean of its divisors is an integer number (2184840).

Almost surely, 2^39389664 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 39389664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52436160).

39389664 is an abundant number, since it is smaller than the sum of its proper divisors (65482656).

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

39389664 is a wasteful number, since it uses less digits than its factorization.

39389664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5863 (or 5855 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 39389664 is about 6276.1185457255. The cubic root of 39389664 is about 340.2468334477.

The spelling of 39389664 in words is "thirty-nine million, three hundred eighty-nine thousand, six hundred sixty-four".