38139912 has 48 divisors (see below), whose sum is σ = 103631580. Its totient is φ = 12672000.

The previous prime is 38139887. The next prime is 38139917. The reversal of 38139912 is 21993183.

It can be written as a sum of positive squares in 2 ways, for example, as 26071236 + 12068676 = 5106^2 + 3474^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (38139917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28212 + ... + 29532.

Almost surely, 2^38139912 is an apocalyptic number.

It is an amenable number.

38139912 is an abundant number, since it is smaller than the sum of its proper divisors (65491668).

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

38139912 is a wasteful number, since it uses less digits than its factorization.

38139912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1727 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 38139912 is about 6175.7519380234. The cubic root of 38139912 is about 336.6096499638.

The spelling of 38139912 in words is "thirty-eight million, one hundred thirty-nine thousand, nine hundred twelve".