38139612 has 96 divisors (see below), whose sum is σ = 111820800. Its totient is φ = 9865152.

The previous prime is 38139601. The next prime is 38139613. The reversal of 38139612 is 21693183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38139613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36189 + ... + 37227.

It is an arithmetic number, because the mean of its divisors is an integer number (1164800).

Almost surely, 2^38139612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38139612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55910400).

38139612 is an abundant number, since it is smaller than the sum of its proper divisors (73681188).

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

38139612 is a wasteful number, since it uses less digits than its factorization.

38139612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1093 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 38139612 is about 6175.7276494353. The cubic root of 38139612 is about 336.6087673962.

It can be divided in two parts, 381 and 39612, that added together give a palindrome (39993).

The spelling of 38139612 in words is "thirty-eight million, one hundred thirty-nine thousand, six hundred twelve".