18428688 has 80 divisors (see below), whose sum is σ = 54758400. Its totient is φ = 5927040.

The previous prime is 18428633. The next prime is 18428713. The reversal of 18428688 is 88682481.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11793 + ... + 13263.

It is an arithmetic number, because the mean of its divisors is an integer number (684480).

Almost surely, 2^18428688 is an apocalyptic number.

18428688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18428688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27379200).

18428688 is an abundant number, since it is smaller than the sum of its proper divisors (36329712).

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

18428688 is a wasteful number, since it uses less digits than its factorization.

18428688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517 (or 1505 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 18428688 is about 4292.8647777446. The cubic root of 18428688 is about 264.1383572291.

The spelling of 18428688 in words is "eighteen million, four hundred twenty-eight thousand, six hundred eighty-eight".