38664749 has 8 divisors (see below), whose sum is σ = 40999608. Its totient is φ = 36336640.

The previous prime is 38664739. The next prime is 38664751. The reversal of 38664749 is 94746683.

It can be written as a sum of positive squares in 4 ways, for example, as 24186724 + 14478025 = 4918^2 + 3805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38664749 - 2²⁴ = 21887533 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 (38664709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14789 + ... + 17205.

It is an arithmetic number, because the mean of its divisors is an integer number (5124951).

Almost surely, 2^38664749 is an apocalyptic number.

It is an amenable number.

38664749 is a deficient number, since it is larger than the sum of its proper divisors (2334859).

38664749 is a wasteful number, since it uses less digits than its factorization.

38664749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375.

The product of its digits is 870912, while the sum is 47.

The square root of 38664749 is about 6218.0985035620. The cubic root of 38664749 is about 338.1466311729.

The spelling of 38664749 in words is "thirty-eight million, six hundred sixty-four thousand, seven hundred forty-nine".