2188860 has 36 divisors (see below), whose sum is σ = 6161064. Its totient is φ = 580640.

The previous prime is 2188831. The next prime is 2188861. The reversal of 2188860 is 688812.

It is a super-2 number, since 2×2188860² = 9582216199200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11365 + ... + 11555.

2^2188860 is an apocalyptic number.

2188860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2188860 is an abundant number, since it is smaller than the sum of its proper divisors (3972204).

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

2188860 is a wasteful number, since it uses less digits than its factorization.

2188860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 2188860 is about 1479.4796382512. The cubic root of 2188860 is about 129.8392490377.

The spelling of 2188860 in words is "two million, one hundred eighty-eight thousand, eight hundred sixty".