2156028 has 24 divisors (see below), whose sum is σ = 5749632. Its totient is φ = 615984.

The previous prime is 2156023. The next prime is 2156039. The reversal of 2156028 is 8206512.

2156028 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2155989 and 2156007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12750 + ... + 12917.

It is an arithmetic number, because the mean of its divisors is an integer number (239568).

2^2156028 is an apocalyptic number.

2156028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2156028 is an abundant number, since it is smaller than the sum of its proper divisors (3593604).

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

2156028 is a wasteful number, since it uses less digits than its factorization.

2156028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25681 (or 25679 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2156028 is about 1468.3419220331. The cubic root of 2156028 is about 129.1867974637.

The spelling of 2156028 in words is "two million, one hundred fifty-six thousand, twenty-eight".