39889656 has 48 divisors (see below), whose sum is σ = 109660200. Its totient is φ = 13096512.

The previous prime is 39889637. The next prime is 39889657. The reversal of 39889656 is 65698893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39889657) 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, 690 + ... + 8958.

Almost surely, 2^39889656 is an apocalyptic number.

39889656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39889656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54830100).

39889656 is an abundant number, since it is smaller than the sum of its proper divisors (69770544).

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

39889656 is a wasteful number, since it uses less digits than its factorization.

39889656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8348 (or 8341 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 39889656 is about 6315.8258367374. The cubic root of 39889656 is about 341.6804237438.

The spelling of 39889656 in words is "thirty-nine million, eight hundred eighty-nine thousand, six hundred fifty-six".