39943044 has 120 divisors (see below), whose sum is σ = 110909568. Its totient is φ = 12519360.

The previous prime is 39943039. The next prime is 39943049. The reversal of 39943044 is 44034993.

It is an interprime number because it is at equal distance from previous prime (39943039) and next prime (39943049).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39943049) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 654774 + ... + 654834.

Almost surely, 2^39943044 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 39943044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55454784).

39943044 is an abundant number, since it is smaller than the sum of its proper divisors (70966524).

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

39943044 is a wasteful number, since it uses less digits than its factorization.

39943044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 39943044 is about 6320.0509491617. The cubic root of 39943044 is about 341.8327899141.

The spelling of 39943044 in words is "thirty-nine million, nine hundred forty-three thousand, forty-four".