138503372 has 24 divisors (see below), whose sum is σ = 278547360. Its totient is φ = 59028480.

The previous prime is 138503317. The next prime is 138503377. The reversal of 138503372 is 273305831.

It is not an unprimeable number, because it can be changed into a prime (138503377) 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, 8597 + ... + 18732.

It is an arithmetic number, because the mean of its divisors is an integer number (11606140).

Almost surely, 2^138503372 is an apocalyptic number.

It is an amenable number.

138503372 is an abundant number, since it is smaller than the sum of its proper divisors (140043988).

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

138503372 is a wasteful number, since it uses less digits than its factorization.

138503372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27521 (or 27519 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 138503372 is about 11768.7455576200. The cubic root of 138503372 is about 517.3924840624.

The spelling of 138503372 in words is "one hundred thirty-eight million, five hundred three thousand, three hundred seventy-two".