39393828 has 72 divisors (see below), whose sum is σ = 107321760. Its totient is φ = 12138240.

The previous prime is 39393817. The next prime is 39393829. The reversal of 39393828 is 82839393.

It is not an unprimeable number, because it can be changed into a prime (39393829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35563 + ... + 36653.

It is an arithmetic number, because the mean of its divisors is an integer number (1490580).

Almost surely, 2^39393828 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 39393828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53660880).

39393828 is an abundant number, since it is smaller than the sum of its proper divisors (67927932).

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

39393828 is a wasteful number, since it uses less digits than its factorization.

39393828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1172 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 39393828 is about 6276.4502706546. The cubic root of 39393828 is about 340.2588225311.

The spelling of 39393828 in words is "thirty-nine million, three hundred ninety-three thousand, eight hundred twenty-eight".