2156328 has 64 divisors (see below), whose sum is σ = 6120000. Its totient is φ = 703296.

The previous prime is 2156317. The next prime is 2156339. The reversal of 2156328 is 8236512.

2156328 is a `hidden beast` number, since 21 + 5 + 632 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (2156317) and next prime (2156339).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14398 + ... + 14546.

It is an arithmetic number, because the mean of its divisors is an integer number (95625).

2^2156328 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 2156328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3060000).

2156328 is an abundant number, since it is smaller than the sum of its proper divisors (3963672).

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

2156328 is a wasteful number, since it uses less digits than its factorization.

2156328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 221 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2156328 is about 1468.4440745224. Note that the first 3 decimals coincide. The cubic root of 2156328 is about 129.1927890744.

The spelling of 2156328 in words is "two million, one hundred fifty-six thousand, three hundred twenty-eight".