2157896 has 16 divisors (see below), whose sum is σ = 4357500. Its totient is φ = 995904.

The previous prime is 2157893. The next prime is 2157899. The reversal of 2157896 is 6987512.

It is an interprime number because it is at equal distance from previous prime (2157893) and next prime (2157899).

It can be written as a sum of positive squares in 2 ways, for example, as 1653796 + 504100 = 1286^2 + 710^2 .

It is not an unprimeable number, because it can be changed into a prime (2157893) 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, 10271 + ... + 10478.

2^2157896 is an apocalyptic number.

2157896 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2157896 is an abundant number, since it is smaller than the sum of its proper divisors (2199604).

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

2157896 is a wasteful number, since it uses less digits than its factorization.

2157896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20768 (or 20764 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 2157896 is about 1468.9778759396. The cubic root of 2157896 is about 129.2240961872.

The spelling of 2157896 in words is "two million, one hundred fifty-seven thousand, eight hundred ninety-six".