2157888 has 28 divisors (see below), whose sum is σ = 5709920. Its totient is φ = 719232.

The previous prime is 2157863. The next prime is 2157893. The reversal of 2157888 is 8887512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5428 + ... + 5811.

2^2157888 is an apocalyptic number.

It is an amenable number.

2157888 is an abundant number, since it is smaller than the sum of its proper divisors (3552032).

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

2157888 is a wasteful number, since it uses less digits than its factorization.

2157888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11254 (or 11244 counting only the distinct ones).

The product of its digits is 35840, while the sum is 39.

The square root of 2157888 is about 1468.9751529553. The cubic root of 2157888 is about 129.2239364955.

The spelling of 2157888 in words is "two million, one hundred fifty-seven thousand, eight hundred eighty-eight".