138996472 has 8 divisors (see below), whose sum is σ = 260618400. Its totient is φ = 69498232.

The previous prime is 138996469. The next prime is 138996493. The reversal of 138996472 is 274699831.

138996472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 8687272 + ... + 8687287.

It is an arithmetic number, because the mean of its divisors is an integer number (32577300).

Almost surely, 2^138996472 is an apocalyptic number.

It is an amenable number.

138996472 is a deficient number, since it is larger than the sum of its proper divisors (121621928).

138996472 is a wasteful number, since it uses less digits than its factorization.

138996472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17374565 (or 17374561 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 138996472 is about 11789.6765010750. The cubic root of 138996472 is about 518.0057641115.

The spelling of 138996472 in words is "one hundred thirty-eight million, nine hundred ninety-six thousand, four hundred seventy-two".