138297558 has 32 divisors (see below), whose sum is σ = 320117760. Its totient is φ = 39012480.

The previous prime is 138297557. The next prime is 138297559. The reversal of 138297558 is 855792831.

It is an interprime number because it is at equal distance from previous prime (138297557) and next prime (138297559).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138297557) 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, 17523 + ... + 24158.

It is an arithmetic number, because the mean of its divisors is an integer number (10003680).

Almost surely, 2^138297558 is an apocalyptic number.

138297558 is an abundant number, since it is smaller than the sum of its proper divisors (181820202).

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

138297558 is a wasteful number, since it uses less digits than its factorization.

138297558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41772.

The product of its digits is 604800, while the sum is 48.

The square root of 138297558 is about 11759.9982142856. The cubic root of 138297558 is about 517.1360777752.

The spelling of 138297558 in words is "one hundred thirty-eight million, two hundred ninety-seven thousand, five hundred fifty-eight".