2139800 has 48 divisors (see below), whose sum is σ = 5364240. Its totient is φ = 789120.

The previous prime is 2139757. The next prime is 2139811. The reversal of 2139800 is 89312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2189 + ... + 3011.

It is an arithmetic number, because the mean of its divisors is an integer number (111755).

2^2139800 is an apocalyptic number.

2139800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2682120).

2139800 is an abundant number, since it is smaller than the sum of its proper divisors (3224440).

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

2139800 is a wasteful number, since it uses less digits than its factorization.

2139800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852 (or 843 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2139800 is about 1462.8055236428. The cubic root of 2139800 is about 128.8618596159.

The spelling of 2139800 in words is "two million, one hundred thirty-nine thousand, eight hundred".