2158788 has 12 divisors (see below), whose sum is σ = 5037200. Its totient is φ = 719592.

The previous prime is 2158781. The next prime is 2158801. The reversal of 2158788 is 8878512.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (2158781) 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, 89938 + ... + 89961.

2^2158788 is an apocalyptic number.

It is an amenable number.

2158788 is an abundant number, since it is smaller than the sum of its proper divisors (2878412).

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

2158788 is a wasteful number, since it uses less digits than its factorization.

2158788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179906 (or 179904 counting only the distinct ones).

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

The square root of 2158788 is about 1469.2814570395. The cubic root of 2158788 is about 129.2418993336.

The spelling of 2158788 in words is "two million, one hundred fifty-eight thousand, seven hundred eighty-eight".