2157288 has 32 divisors (see below), whose sum is σ = 6164160. Its totient is φ = 616320.

The previous prime is 2157277. The next prime is 2157293. The reversal of 2157288 is 8827512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6253 + ... + 6588.

It is an arithmetic number, because the mean of its divisors is an integer number (192630).

2^2157288 is an apocalyptic number.

2157288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2157288 is an abundant number, since it is smaller than the sum of its proper divisors (4006872).

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

2157288 is a wasteful number, since it uses less digits than its factorization.

2157288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12857 (or 12853 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 2157288 is about 1468.7709147447. The cubic root of 2157288 is about 129.2119584953.

It can be divided in two parts, 215 and 7288, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 2157288 in words is "two million, one hundred fifty-seven thousand, two hundred eighty-eight".