39894736 has 40 divisors (see below), whose sum is σ = 89190720. Its totient is φ = 16932864.

The previous prime is 39894731. The next prime is 39894761. The reversal of 39894736 is 63749893.

It is a self number, because there is not a number n which added to its sum of digits gives 39894736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39894731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10320 + ... + 13648.

It is an arithmetic number, because the mean of its divisors is an integer number (2229768).

Almost surely, 2^39894736 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 39894736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44595360).

39894736 is an abundant number, since it is smaller than the sum of its proper divisors (49295984).

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

39894736 is a wasteful number, since it uses less digits than its factorization.

39894736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451 (or 3445 counting only the distinct ones).

The product of its digits is 979776, while the sum is 49.

The square root of 39894736 is about 6316.2279882854. The cubic root of 39894736 is about 341.6949276114.

The spelling of 39894736 in words is "thirty-nine million, eight hundred ninety-four thousand, seven hundred thirty-six".