39138934 has 4 divisors (see below), whose sum is σ = 58708404. Its totient is φ = 19569466.

The previous prime is 39138919. The next prime is 39138937. The reversal of 39138934 is 43983193.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39138937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9784732 + ... + 9784735.

It is an arithmetic number, because the mean of its divisors is an integer number (14677101).

Almost surely, 2^39138934 is an apocalyptic number.

39138934 is a deficient number, since it is larger than the sum of its proper divisors (19569470).

39138934 is a wasteful number, since it uses less digits than its factorization.

39138934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19569469.

The product of its digits is 69984, while the sum is 40.

The square root of 39138934 is about 6256.1117317388. Note that the first 3 decimals coincide. The cubic root of 39138934 is about 339.5233632701.

The spelling of 39138934 in words is "thirty-nine million, one hundred thirty-eight thousand, nine hundred thirty-four".