39990744 has 192 divisors, whose sum is σ = 125798400. Its totient is φ = 11404800.

The previous prime is 39990733. The next prime is 39990751. The reversal of 39990744 is 44709993.

It is a self number, because there is not a number n which added to its sum of digits gives 39990744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 975364 + ... + 975404.

It is an arithmetic number, because the mean of its divisors is an integer number (655200).

Almost surely, 2^39990744 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 39990744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62899200).

39990744 is an abundant number, since it is smaller than the sum of its proper divisors (85807656).

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

39990744 is a wasteful number, since it uses less digits than its factorization.

39990744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 39990744 is about 6323.8235269495. The cubic root of 39990744 is about 341.9688080714.

The spelling of 39990744 in words is "thirty-nine million, nine hundred ninety thousand, seven hundred forty-four".