138890598 has 96 divisors (see below), whose sum is σ = 358328448. Its totient is φ = 35481600.

The previous prime is 138890597. The next prime is 138890617. The reversal of 138890598 is 895098831.

It is a self number, because there is not a number n which added to its sum of digits gives 138890598.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138890597) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 216358 + ... + 216998.

It is an arithmetic number, because the mean of its divisors is an integer number (3732588).

Almost surely, 2^138890598 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138890598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179164224).

138890598 is an abundant number, since it is smaller than the sum of its proper divisors (219437850).

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

138890598 is a wasteful number, since it uses less digits than its factorization.

138890598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The square root of 138890598 is about 11785.1855309961. The cubic root of 138890598 is about 517.8742085592.

The spelling of 138890598 in words is "one hundred thirty-eight million, eight hundred ninety thousand, five hundred ninety-eight".