39828321 has 32 divisors (see below), whose sum is σ = 63947520. Its totient is φ = 24354432.

The previous prime is 39828307. The next prime is 39828329. The reversal of 39828321 is 12382893.

It is a happy number.

It is not a de Polignac number, because 39828321 - 2⁷ = 39828193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39828329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81540 + ... + 82026.

It is an arithmetic number, because the mean of its divisors is an integer number (1998360).

Almost surely, 2^39828321 is an apocalyptic number.

It is an amenable number.

39828321 is a deficient number, since it is larger than the sum of its proper divisors (24119199).

39828321 is a wasteful number, since it uses less digits than its factorization.

39828321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 736 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 39828321 is about 6310.9683092217. The cubic root of 39828321 is about 341.5052094039.

The spelling of 39828321 in words is "thirty-nine million, eight hundred twenty-eight thousand, three hundred twenty-one".