38939791 has 8 divisors (see below), whose sum is σ = 43516368. Its totient is φ = 34536000.

The previous prime is 38939767. The next prime is 38939821. The reversal of 38939791 is 19793983.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38939791 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 (38939701) 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, 42720 + ... + 43621.

It is an arithmetic number, because the mean of its divisors is an integer number (5439546).

Almost surely, 2^38939791 is an apocalyptic number.

38939791 is a deficient number, since it is larger than the sum of its proper divisors (4576577).

38939791 is a wasteful number, since it uses less digits than its factorization.

38939791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86393.

The product of its digits is 367416, while the sum is 49.

The square root of 38939791 is about 6240.1755584278. The cubic root of 38939791 is about 338.9465403585.

The spelling of 38939791 in words is "thirty-eight million, nine hundred thirty-nine thousand, seven hundred ninety-one".