38970728 has 16 divisors (see below), whose sum is σ = 74770080. Its totient is φ = 19032048.

The previous prime is 38970727. The next prime is 38970773. The reversal of 38970728 is 82707983.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (38970727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56300 + ... + 56987.

It is an arithmetic number, because the mean of its divisors is an integer number (4673130).

Almost surely, 2^38970728 is an apocalyptic number.

It is an amenable number.

38970728 is a deficient number, since it is larger than the sum of its proper divisors (35799352).

38970728 is a wasteful number, since it uses less digits than its factorization.

38970728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113336 (or 113332 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 38970728 is about 6242.6539228120. The cubic root of 38970728 is about 339.0362790131.

It can be divided in two parts, 389 and 70728, that added together give a palindrome (71117).

The spelling of 38970728 in words is "thirty-eight million, nine hundred seventy thousand, seven hundred twenty-eight".