138924675 has 36 divisors (see below), whose sum is σ = 261933880. Its totient is φ = 70191360.

The previous prime is 138924659. The next prime is 138924679. The reversal of 138924675 is 576429831.

It is not a de Polignac number, because 138924675 - 2⁴ = 138924659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 138924675.

It is not an unprimeable number, because it can be changed into a prime (138924679) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11974 + ... + 20523.

Almost surely, 2^138924675 is an apocalyptic number.

138924675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138924675 is a deficient number, since it is larger than the sum of its proper divisors (123009205).

138924675 is a wasteful number, since it uses less digits than its factorization.

138924675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32532 (or 32524 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 138924675 is about 11786.6311980990. The cubic root of 138924675 is about 517.9165588132.

The spelling of 138924675 in words is "one hundred thirty-eight million, nine hundred twenty-four thousand, six hundred seventy-five".