2163888 has 40 divisors (see below), whose sum is σ = 6212400. Its totient is φ = 721152.

The previous prime is 2163883. The next prime is 2163911. The reversal of 2163888 is 8883612.

It is a super-2 number, since 2×2163888² = 9364822553088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2163881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2073 + ... + 2936.

It is an arithmetic number, because the mean of its divisors is an integer number (155310).

2^2163888 is an apocalyptic number.

It is an amenable number.

2163888 is an abundant number, since it is smaller than the sum of its proper divisors (4048512).

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

2163888 is a wasteful number, since it uses less digits than its factorization.

2163888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026 (or 5014 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 2163888 is about 1471.0159754401. The cubic root of 2163888 is about 129.3435945614.

The spelling of 2163888 in words is "two million, one hundred sixty-three thousand, eight hundred eighty-eight".