38688749 has 12 divisors (see below), whose sum is σ = 42943680. Its totient is φ = 34561800.

The previous prime is 38688721. The next prime is 38688779. The reversal of 38688749 is 94788683.

It is a happy number.

It is not a de Polignac number, because 38688749 - 2¹⁶ = 38623213 is a prime.

It is a Duffinian number.

Its product of digits (2322432) is a multiple of the sum of its prime factors (512).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38688749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38688709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183254 + ... + 183464.

It is an arithmetic number, because the mean of its divisors is an integer number (3578640).

Almost surely, 2^38688749 is an apocalyptic number.

It is an amenable number.

38688749 is a deficient number, since it is larger than the sum of its proper divisors (4254931).

38688749 is an equidigital number, since it uses as much as digits as its factorization.

38688749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 301 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 53.

The square root of 38688749 is about 6220.0280545991. The cubic root of 38688749 is about 338.2165815435.

The spelling of 38688749 in words is "thirty-eight million, six hundred eighty-eight thousand, seven hundred forty-nine".