39886138 has 4 divisors (see below), whose sum is σ = 59829210. Its totient is φ = 19943068.

The previous prime is 39886129. The next prime is 39886139. The reversal of 39886138 is 83168893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83168893 = 239 ⋅347987.

It can be written as a sum of positive squares in only one way, i.e., 39225169 + 660969 = 6263^2 + 813^2 .

It is not an unprimeable number, because it can be changed into a prime (39886139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9971533 + ... + 9971536.

Almost surely, 2^39886138 is an apocalyptic number.

39886138 is a deficient number, since it is larger than the sum of its proper divisors (19943072).

39886138 is a wasteful number, since it uses less digits than its factorization.

39886138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19943071.

The product of its digits is 248832, while the sum is 46.

The square root of 39886138 is about 6315.5473238667. The cubic root of 39886138 is about 341.6703788082.

The spelling of 39886138 in words is "thirty-nine million, eight hundred eighty-six thousand, one hundred thirty-eight".