2165880528 has 120 divisors (see below), whose sum is σ = 7292043200. Its totient is φ = 586248192.

The previous prime is 2165880523. The next prime is 2165880551. The reversal of 2165880528 is 8250885612.

2165880528 is a `hidden beast` number, since 2 + 16 + 588 + 0 + 52 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165880523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37393 + ... + 75696.

Almost surely, 2^2165880528 is an apocalyptic number.

2165880528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2165880528 is an abundant number, since it is smaller than the sum of its proper divisors (5126162672).

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

2165880528 is a wasteful number, since it uses less digits than its factorization.

2165880528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113129 (or 113120 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The square root of 2165880528 is about 46539.0215625554. The cubic root of 2165880528 is about 1293.8328263993.

The spelling of 2165880528 in words is "two billion, one hundred sixty-five million, eight hundred eighty thousand, five hundred twenty-eight".