138925630 has 32 divisors (see below), whose sum is σ = 257826240. Its totient is φ = 53863680.

The previous prime is 138925613. The next prime is 138925637. The reversal of 138925630 is 36529831.

It is a self number, because there is not a number n which added to its sum of digits gives 138925630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138925637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67456 + ... + 69484.

It is an arithmetic number, because the mean of its divisors is an integer number (8057070).

Almost surely, 2^138925630 is an apocalyptic number.

138925630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138925630 is a deficient number, since it is larger than the sum of its proper divisors (118900610).

138925630 is a wasteful number, since it uses less digits than its factorization.

138925630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 138925630 is about 11786.6717100291. The cubic root of 138925630 is about 517.9177455694.

The spelling of 138925630 in words is "one hundred thirty-eight million, nine hundred twenty-five thousand, six hundred thirty".