38945979 has 6 divisors (see below), whose sum is σ = 56255316. Its totient is φ = 25963980.

The previous prime is 38945909. The next prime is 38945981. The reversal of 38945979 is 97954983.

It is a de Polignac number, because none of the positive numbers 2^k-38945979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38945909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2163657 + ... + 2163674.

It is an arithmetic number, because the mean of its divisors is an integer number (9375886).

Almost surely, 2^38945979 is an apocalyptic number.

38945979 is a deficient number, since it is larger than the sum of its proper divisors (17309337).

38945979 is a wasteful number, since it uses less digits than its factorization.

38945979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4327337 (or 4327334 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 38945979 is about 6240.6713581152. The cubic root of 38945979 is about 338.9644936316.

The spelling of 38945979 in words is "thirty-eight million, nine hundred forty-five thousand, nine hundred seventy-nine".