39399228 has 72 divisors (see below), whose sum is σ = 111624240. Its totient is φ = 11612160.

The previous prime is 39399211. The next prime is 39399247. The reversal of 39399228 is 82299393.

39399228 is a `hidden beast` number, since 39 + 399 + 228 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13308 + ... + 15996.

Almost surely, 2^39399228 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 39399228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55812120).

39399228 is an abundant number, since it is smaller than the sum of its proper divisors (72225012).

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

39399228 is a wasteful number, since it uses less digits than its factorization.

39399228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747 (or 2742 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 39399228 is about 6276.8804353755. The cubic root of 39399228 is about 340.2743690755.

The spelling of 39399228 in words is "thirty-nine million, three hundred ninety-nine thousand, two hundred twenty-eight".