138634260 has 48 divisors (see below), whose sum is σ = 408609600. Its totient is φ = 35023104.

The previous prime is 138634217. The next prime is 138634267. The reversal of 138634260 is 62436831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138634267) 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, 59665 + ... + 61944.

It is an arithmetic number, because the mean of its divisors is an integer number (8512700).

Almost surely, 2^138634260 is an apocalyptic number.

138634260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138634260 is an abundant number, since it is smaller than the sum of its proper divisors (269975340).

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

138634260 is a wasteful number, since it uses less digits than its factorization.

138634260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121640 (or 121638 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 138634260 is about 11774.3050750352. The cubic root of 138634260 is about 517.5554142625. Note that the first 3 decimals are identical.

The spelling of 138634260 in words is "one hundred thirty-eight million, six hundred thirty-four thousand, two hundred sixty".