2159800 has 24 divisors (see below), whose sum is σ = 5022000. Its totient is φ = 863840.

The previous prime is 2159789. The next prime is 2159809. The reversal of 2159800 is 89512.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5200 + ... + 5599.

It is an arithmetic number, because the mean of its divisors is an integer number (209250).

2^2159800 is an apocalyptic number.

2159800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2159800 is an abundant number, since it is smaller than the sum of its proper divisors (2862200).

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

2159800 is a wasteful number, since it uses less digits than its factorization.

2159800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10815 (or 10806 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2159800 is about 1469.6258027131. The cubic root of 2159800 is about 129.2620915849.

It can be divided in two parts, 2 and 159800, that multiplied together give a triangular number (319600 = T₇₉₉).

The spelling of 2159800 in words is "two million, one hundred fifty-nine thousand, eight hundred".