138848724 has 72 divisors (see below), whose sum is σ = 424726848. Its totient is φ = 37336320.

The previous prime is 138848693. The next prime is 138848729. The reversal of 138848724 is 427848831.

It is a self number, because there is not a number n which added to its sum of digits gives 138848724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138848729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11922 + ... + 20489.

It is an arithmetic number, because the mean of its divisors is an integer number (5898984).

Almost surely, 2^138848724 is an apocalyptic number.

138848724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138848724 is an abundant number, since it is smaller than the sum of its proper divisors (285878124).

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

138848724 is a wasteful number, since it uses less digits than its factorization.

138848724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32445 (or 32440 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 138848724 is about 11783.4088446425. The cubic root of 138848724 is about 517.8221588534.

The spelling of 138848724 in words is "one hundred thirty-eight million, eight hundred forty-eight thousand, seven hundred twenty-four".