39438018 has 12 divisors (see below), whose sum is σ = 85449078. Its totient is φ = 13146000.

The previous prime is 39438001. The next prime is 39438037. The reversal of 39438018 is 81083493.

It can be written as a sum of positive squares in only one way, i.e., 23011209 + 16426809 = 4797^2 + 4053^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1095483 + ... + 1095518.

Almost surely, 2^39438018 is an apocalyptic number.

39438018 is an abundant number, since it is smaller than the sum of its proper divisors (46011060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39438018 is a wasteful number, since it uses less digits than its factorization.

39438018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191009 (or 2191006 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 39438018 is about 6279.9695859136. The cubic root of 39438018 is about 340.3860033562.

The spelling of 39438018 in words is "thirty-nine million, four hundred thirty-eight thousand, eighteen".