18428280 has 64 divisors (see below), whose sum is σ = 59542560. Its totient is φ = 4535808.

The previous prime is 18428273. The next prime is 18428297. The reversal of 18428280 is 8282481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4347 + ... + 7466.

Almost surely, 2^18428280 is an apocalyptic number.

18428280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18428280 is an abundant number, since it is smaller than the sum of its proper divisors (41114280).

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

18428280 is a wasteful number, since it uses less digits than its factorization.

18428280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11840 (or 11836 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 18428280 is about 4292.8172567674. The cubic root of 18428280 is about 264.1364079269.

The spelling of 18428280 in words is "eighteen million, four hundred twenty-eight thousand, two hundred eighty".