39438428 has 12 divisors (see below), whose sum is σ = 69281520. Its totient is φ = 19643712.

The previous prime is 39438407. The next prime is 39438437. The reversal of 39438428 is 82483493.

It is a happy number.

It is a super-2 number, since 2×39438428² = 3110779206222368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17693 + ... + 19796.

It is an arithmetic number, because the mean of its divisors is an integer number (5773460).

Almost surely, 2^39438428 is an apocalyptic number.

It is an amenable number.

39438428 is a deficient number, since it is larger than the sum of its proper divisors (29843092).

39438428 is a wasteful number, since it uses less digits than its factorization.

39438428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37756 (or 37754 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 39438428 is about 6280.0022292990. The cubic root of 39438428 is about 340.3871829099.

The spelling of 39438428 in words is "thirty-nine million, four hundred thirty-eight thousand, four hundred twenty-eight".