18873888 has 96 divisors (see below), whose sum is σ = 55121472. Its totient is φ = 5606400.

The previous prime is 18873887. The next prime is 18873889. The reversal of 18873888 is 88837881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18873887) and next prime (18873889).

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 18873888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18873887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64270 + ... + 64562.

It is an arithmetic number, because the mean of its divisors is an integer number (574182).

Almost surely, 2^18873888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18873888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27560736).

18873888 is an abundant number, since it is smaller than the sum of its proper divisors (36247584).

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

18873888 is a wasteful number, since it uses less digits than its factorization.

18873888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 370 counting only the distinct ones).

The product of its digits is 688128, while the sum is 51.

The square root of 18873888 is about 4344.4088205416. The cubic root of 18873888 is about 266.2484722961.

It can be divided in two parts, 1887 and 3888, that added together give a palindrome (5775).

The spelling of 18873888 in words is "eighteen million, eight hundred seventy-three thousand, eight hundred eighty-eight".