2156364 has 72 divisors (see below), whose sum is σ = 6406400. Its totient is φ = 598752.

The previous prime is 2156359. The next prime is 2156369. The reversal of 2156364 is 4636512.

2156364 is a `hidden beast` number, since 21 + 5 + 636 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (2156359) and next prime (2156369).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2156369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10737 + ... + 10935.

2^2156364 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 2156364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3203200).

2156364 is an abundant number, since it is smaller than the sum of its proper divisors (4250036).

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

2156364 is a wasteful number, since it uses less digits than its factorization.

2156364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 254 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2156364 is about 1468.4563323436. The cubic root of 2156364 is about 129.1935080304.

The spelling of 2156364 in words is "two million, one hundred fifty-six thousand, three hundred sixty-four".