138849756 has 24 divisors (see below), whose sum is σ = 324839424. Its totient is φ = 46160880.

The previous prime is 138849751. The next prime is 138849769. The reversal of 138849756 is 657948831.

138849756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138849699 and 138849708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138849751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10510 + ... + 19701.

It is an arithmetic number, because the mean of its divisors is an integer number (13534976).

Almost surely, 2^138849756 is an apocalyptic number.

It is an amenable number.

138849756 is an abundant number, since it is smaller than the sum of its proper divisors (185989668).

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

138849756 is a wasteful number, since it uses less digits than its factorization.

138849756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30601 (or 30599 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 138849756 is about 11783.4526349453. The cubic root of 138849756 is about 517.8234417631.

The spelling of 138849756 in words is "one hundred thirty-eight million, eight hundred forty-nine thousand, seven hundred fifty-six".