138617630 has 16 divisors (see below), whose sum is σ = 249865344. Its totient is φ = 55368480.

The previous prime is 138617621. The next prime is 138617639. The reversal of 138617630 is 36716831.

It is an interprime number because it is at equal distance from previous prime (138617621) and next prime (138617639).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138617639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126 + ... + 16785.

It is an arithmetic number, because the mean of its divisors is an integer number (15616584).

Almost surely, 2^138617630 is an apocalyptic number.

138617630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138617630 is a deficient number, since it is larger than the sum of its proper divisors (111247714).

138617630 is a wasteful number, since it uses less digits than its factorization.

138617630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19651.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 138617630 is about 11773.5988550655. The cubic root of 138617630 is about 517.5347188233.

The spelling of 138617630 in words is "one hundred thirty-eight million, six hundred seventeen thousand, six hundred thirty".