38728559 has 6 divisors (see below), whose sum is σ = 39697920. Its totient is φ = 37782320.

The previous prime is 38728553. The next prime is 38728609. The reversal of 38728559 is 95582783.

It is not a de Polignac number, because 38728559 - 2⁸ = 38728303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38728553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9839 + ... + 13200.

It is an arithmetic number, because the mean of its divisors is an integer number (6616320).

Almost surely, 2^38728559 is an apocalyptic number.

38728559 is a deficient number, since it is larger than the sum of its proper divisors (969361).

38728559 is an equidigital number, since it uses as much as digits as its factorization.

38728559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23121 (or 23080 counting only the distinct ones).

The product of its digits is 604800, while the sum is 47.

The square root of 38728559 is about 6223.2273781375. The cubic root of 38728559 is about 338.3325479583.

The spelling of 38728559 in words is "thirty-eight million, seven hundred twenty-eight thousand, five hundred fifty-nine".