18888216 has 32 divisors (see below), whose sum is σ = 47442240. Its totient is φ = 6266528.

The previous prime is 18888209. The next prime is 18888217. The reversal of 18888216 is 61288881.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18888217) 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, 3715 + ... + 7181.

It is an arithmetic number, because the mean of its divisors is an integer number (1482570).

Almost surely, 2^18888216 is an apocalyptic number.

It is an amenable number.

18888216 is an abundant number, since it is smaller than the sum of its proper divisors (28554024).

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

18888216 is a wasteful number, since it uses less digits than its factorization.

18888216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703 (or 3699 counting only the distinct ones).

The product of its digits is 49152, while the sum is 42.

The square root of 18888216 is about 4346.0575237795. The cubic root of 18888216 is about 266.3158289034.

The spelling of 18888216 in words is "eighteen million, eight hundred eighty-eight thousand, two hundred sixteen".