39728304 has 120 divisors (see below), whose sum is σ = 138657792. Its totient is φ = 10316160.

The previous prime is 39728281. The next prime is 39728309. The reversal of 39728304 is 40382793.

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

It is not an unprimeable number, because it can be changed into a prime (39728309) 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, 9297 + ... + 12879.

Almost surely, 2^39728304 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 39728304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69328896).

39728304 is an abundant number, since it is smaller than the sum of its proper divisors (98929488).

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

39728304 is a wasteful number, since it uses less digits than its factorization.

39728304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615 (or 3606 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 39728304 is about 6303.0392668934. The cubic root of 39728304 is about 341.2191068117.

The spelling of 39728304 in words is "thirty-nine million, seven hundred twenty-eight thousand, three hundred four".