39913944 has 64 divisors (see below), whose sum is σ = 114723840. Its totient is φ = 11335680.

The previous prime is 39913931. The next prime is 39913961. The reversal of 39913944 is 44931993.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 39913896 and 39913905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31809 + ... + 33039.

It is an arithmetic number, because the mean of its divisors is an integer number (1792560).

Almost surely, 2^39913944 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 39913944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57361920).

39913944 is an abundant number, since it is smaller than the sum of its proper divisors (74809896).

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

39913944 is a wasteful number, since it uses less digits than its factorization.

39913944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440 (or 1436 counting only the distinct ones).

The product of its digits is 104976, while the sum is 42.

The square root of 39913944 is about 6317.7483330693. The cubic root of 39913944 is about 341.7497570933.

The spelling of 39913944 in words is "thirty-nine million, nine hundred thirteen thousand, nine hundred forty-four".