18028782 has 24 divisors (see below), whose sum is σ = 39972504. Its totient is φ = 5869584.

The previous prime is 18028753. The next prime is 18028783. The reversal of 18028782 is 28782081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10873 + ... + 12420.

It is an arithmetic number, because the mean of its divisors is an integer number (1665521).

Almost surely, 2^18028782 is an apocalyptic number.

18028782 is an abundant number, since it is smaller than the sum of its proper divisors (21943722).

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

18028782 is a wasteful number, since it uses less digits than its factorization.

18028782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23344 (or 23341 counting only the distinct ones).

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

The square root of 18028782 is about 4246.0313234831. The cubic root of 18028782 is about 262.2137505509.

The spelling of 18028782 in words is "eighteen million, twenty-eight thousand, seven hundred eighty-two".