2138598 has 48 divisors (see below), whose sum is σ = 5780736. Its totient is φ = 555120.

The previous prime is 2138593. The next prime is 2138623. The reversal of 2138598 is 8958312.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138593) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 615 + ... + 2157.

It is an arithmetic number, because the mean of its divisors is an integer number (120432).

2^2138598 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2138598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2890368).

2138598 is an abundant number, since it is smaller than the sum of its proper divisors (3642138).

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

2138598 is a wasteful number, since it uses less digits than its factorization.

2138598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569 (or 1566 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 2138598 is about 1462.3946115874. The cubic root of 2138598 is about 128.8377263687.

The spelling of 2138598 in words is "two million, one hundred thirty-eight thousand, five hundred ninety-eight".