2139798 has 16 divisors (see below), whose sum is σ = 4340736. Its totient is φ = 703080.

The previous prime is 2139757. The next prime is 2139811. The reversal of 2139798 is 8979312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2086 + ... + 2937.

It is an arithmetic number, because the mean of its divisors is an integer number (271296).

2^2139798 is an apocalyptic number.

2139798 is an abundant number, since it is smaller than the sum of its proper divisors (2200938).

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

2139798 is a wasteful number, since it uses less digits than its factorization.

2139798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5099.

The product of its digits is 27216, while the sum is 39.

The square root of 2139798 is about 1462.8048400248. The cubic root of 2139798 is about 128.8618194683.

It can be divided in two parts, 213 and 9798, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 2139798 in words is "two million, one hundred thirty-nine thousand, seven hundred ninety-eight".