2156700 has 144 divisors (see below), whose sum is σ = 7777280. Its totient is φ = 449280.

The previous prime is 2156699. The next prime is 2156711. The reversal of 2156700 is 76512.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27261 + ... + 27339.

2^2156700 is an apocalyptic number.

2156700 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 2156700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3888640).

2156700 is an abundant number, since it is smaller than the sum of its proper divisors (5620580).

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

2156700 is a wasteful number, since it uses less digits than its factorization.

2156700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 2156700 is about 1468.5707337408. The cubic root of 2156700 is about 129.2002179001.

The spelling of 2156700 in words is "two million, one hundred fifty-six thousand, seven hundred".