18027828 has 72 divisors (see below), whose sum is σ = 56096768. Its totient is φ = 4753728.

The previous prime is 18027767. The next prime is 18027829. The reversal of 18027828 is 82872081.

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

It is a junction number, because it is equal to n+sod(n) for n = 18027792 and 18027801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18027829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 525 + ... + 6027.

Almost surely, 2^18027828 is an apocalyptic number.

18027828 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 18027828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28048384).

18027828 is an abundant number, since it is smaller than the sum of its proper divisors (38068940).

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

18027828 is a wasteful number, since it uses less digits than its factorization.

18027828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5533 (or 5528 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 18027828 is about 4245.9189817989. The cubic root of 18027828 is about 262.2091254218.

The spelling of 18027828 in words is "eighteen million, twenty-seven thousand, eight hundred twenty-eight".