38386728 has 24 divisors (see below), whose sum is σ = 103964250. Its totient is φ = 12795552.

The previous prime is 38386709. The next prime is 38386739. The reversal of 38386728 is 82768383.

It can be written as a sum of positive squares in only one way, i.e., 30669444 + 7717284 = 5538^2 + 2778^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 266503 + ... + 266646.

Almost surely, 2^38386728 is an apocalyptic number.

It is an amenable number.

38386728 is an abundant number, since it is smaller than the sum of its proper divisors (65577522).

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

38386728 is a wasteful number, since it uses less digits than its factorization.

38386728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533161 (or 533154 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 38386728 is about 6195.7023814899. The cubic root of 38386728 is about 337.3341934532.

The spelling of 38386728 in words is "thirty-eight million, three hundred eighty-six thousand, seven hundred twenty-eight".