2155628 has 12 divisors (see below), whose sum is σ = 3902640. Its totient is φ = 1040592.

The previous prime is 2155627. The next prime is 2155639. The reversal of 2155628 is 8265512.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2155628.

It is not an unprimeable number, because it can be changed into a prime (2155627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9176 + ... + 9407.

It is an arithmetic number, because the mean of its divisors is an integer number (325220).

2^2155628 is an apocalyptic number.

It is an amenable number.

2155628 is a deficient number, since it is larger than the sum of its proper divisors (1747012).

2155628 is a wasteful number, since it uses less digits than its factorization.

2155628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18616 (or 18614 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 2155628 is about 1468.2057076582. The cubic root of 2155628 is about 129.1788077846.

The spelling of 2155628 in words is "two million, one hundred fifty-five thousand, six hundred twenty-eight".