2156392 has 24 divisors (see below), whose sum is σ = 4704210. Its totient is φ = 924000.

The previous prime is 2156387. The next prime is 2156393. The reversal of 2156392 is 2936512.

It can be written as a sum of positive squares in only one way, i.e., 1223236 + 933156 = 1106^2 + 966^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a d-powerful number, because it can be written as 2⁵ + 1 + 5³ + 6 + 3³ + 9⁵ + 2²¹ .

It is a self number, because there is not a number n which added to its sum of digits gives 2156392.

It is not an unprimeable number, because it can be changed into a prime (2156393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2359 + ... + 3142.

2^2156392 is an apocalyptic number.

It is an amenable number.

2156392 is an abundant number, since it is smaller than the sum of its proper divisors (2547818).

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

2156392 is a wasteful number, since it uses less digits than its factorization.

2156392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521 (or 5510 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 2156392 is about 1468.4658661338. The cubic root of 2156392 is about 129.1940672128.

The spelling of 2156392 in words is "two million, one hundred fifty-six thousand, three hundred ninety-two".