138630630 has 16 divisors (see below), whose sum is σ = 332713584. Its totient is φ = 36968160.

The previous prime is 138630629. The next prime is 138630647. The reversal of 138630630 is 36036831.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 4621021 = 138630630 / (1 + 3 + 8 + 6 + 3 + 0 + 6 + 3 + 0).

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 in 7 ways as a sum of consecutive naturals, for example, 2310481 + ... + 2310540.

It is an arithmetic number, because the mean of its divisors is an integer number (20794599).

Almost surely, 2^138630630 is an apocalyptic number.

138630630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138630630 is an abundant number, since it is smaller than the sum of its proper divisors (194082954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138630630 is a wasteful number, since it uses less digits than its factorization.

138630630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4621031.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 138630630 is about 11774.1509248013. The cubic root of 138630630 is about 517.5508969987.

The spelling of 138630630 in words is "one hundred thirty-eight million, six hundred thirty thousand, six hundred thirty".