138231488 has 28 divisors (see below), whose sum is σ = 290440872. Its totient is φ = 65049600.

The previous prime is 138231463. The next prime is 138231491. The reversal of 138231488 is 884132831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62438 + ... + 64613.

Almost surely, 2^138231488 is an apocalyptic number.

It is an amenable number.

138231488 is an abundant number, since it is smaller than the sum of its proper divisors (152209384).

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

138231488 is a wasteful number, since it uses less digits than its factorization.

138231488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127080 (or 127070 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 138231488 is about 11757.1887796361. The cubic root of 138231488 is about 517.0537128041.

The spelling of 138231488 in words is "one hundred thirty-eight million, two hundred thirty-one thousand, four hundred eighty-eight".