138975488 has 18 divisors (see below), whose sum is σ = 277408614. Its totient is φ = 69487616.

The previous prime is 138975479. The next prime is 138975491. The reversal of 138975488 is 884579831.

It can be written as a sum of positive squares in only one way, i.e., 122589184 + 16386304 = 11072^2 + 4048^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271181 + ... + 271692.

Almost surely, 2^138975488 is an apocalyptic number.

It is an amenable number.

138975488 is a deficient number, since it is larger than the sum of its proper divisors (138433126).

138975488 is an frugal number, since it uses more digits than its factorization.

138975488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542889 (or 542875 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 53.

The square root of 138975488 is about 11788.7865363658. The cubic root of 138975488 is about 517.9796953923.

The spelling of 138975488 in words is "one hundred thirty-eight million, nine hundred seventy-five thousand, four hundred eighty-eight".