38697728 has 18 divisors (see below), whose sum is σ = 77244804. Its totient is φ = 19348736.

The previous prime is 38697719. The next prime is 38697751. The reversal of 38697728 is 82779683.

It is a happy number.

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 as a sum of consecutive naturals, namely, 75326 + ... + 75837.

It is an arithmetic number, because the mean of its divisors is an integer number (4291378).

Almost surely, 2^38697728 is an apocalyptic number.

It is an amenable number.

38697728 is a deficient number, since it is larger than the sum of its proper divisors (38547076).

38697728 is an equidigital number, since it uses as much as digits as its factorization.

38697728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151179 (or 151165 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The square root of 38697728 is about 6220.7497940361. The cubic root of 38697728 is about 338.2427442899.

The spelling of 38697728 in words is "thirty-eight million, six hundred ninety-seven thousand, seven hundred twenty-eight".