2156600 has 48 divisors (see below), whose sum is σ = 5155920. Its totient is φ = 838400.

The previous prime is 2156599. The next prime is 2156617. The reversal of 2156600 is 66512.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 8069 + ... + 8331.

It is an arithmetic number, because the mean of its divisors is an integer number (107415).

2^2156600 is an apocalyptic number.

2156600 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 2156600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2577960).

2156600 is an abundant number, since it is smaller than the sum of its proper divisors (2999320).

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

2156600 is a wasteful number, since it uses less digits than its factorization.

2156600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2156600 is about 1468.5366866374. The cubic root of 2156600 is about 129.1982209879.

The spelling of 2156600 in words is "two million, one hundred fifty-six thousand, six hundred".