39138500 has 24 divisors (see below), whose sum is σ = 85479576. Its totient is φ = 15655200.

The previous prime is 39138497. The next prime is 39138527. The reversal of 39138500 is 583193.

It can be written as a sum of positive squares in 4 ways, for example, as 10601536 + 28536964 = 3256^2 + 5342^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38639 + ... + 39638.

It is an arithmetic number, because the mean of its divisors is an integer number (3561649).

Almost surely, 2^39138500 is an apocalyptic number.

It is an amenable number.

39138500 is an abundant number, since it is smaller than the sum of its proper divisors (46341076).

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

39138500 is a wasteful number, since it uses less digits than its factorization.

39138500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78296 (or 78284 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 39138500 is about 6256.0770455614. The cubic root of 39138500 is about 339.5221083076.

The spelling of 39138500 in words is "thirty-nine million, one hundred thirty-eight thousand, five hundred".