2156672 has 64 divisors (see below), whose sum is σ = 5140800. Its totient is φ = 881664.

The previous prime is 2156669. The next prime is 2156681. The reversal of 2156672 is 2766512.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 25943 + ... + 26025.

It is an arithmetic number, because the mean of its divisors is an integer number (80325).

2^2156672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2570400).

2156672 is an abundant number, since it is smaller than the sum of its proper divisors (2984128).

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

2156672 is an equidigital number, since it uses as much as digits as its factorization.

2156672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 121 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 2156672 is about 1468.5612006314. The cubic root of 2156672 is about 129.1996587709.

The spelling of 2156672 in words is "two million, one hundred fifty-six thousand, six hundred seventy-two".