18268280 has 32 divisors (see below), whose sum is σ = 41783040. Its totient is φ = 7186560.

The previous prime is 18268277. The next prime is 18268303. The reversal of 18268280 is 8286281.

It is a self number, because there is not a number n which added to its sum of digits gives 18268280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304 + ... + 6183.

It is an arithmetic number, because the mean of its divisors is an integer number (1305720).

Almost surely, 2^18268280 is an apocalyptic number.

18268280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18268280 is an abundant number, since it is smaller than the sum of its proper divisors (23514760).

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

18268280 is a wasteful number, since it uses less digits than its factorization.

18268280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559 (or 7555 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 18268280 is about 4274.1408493404. The cubic root of 18268280 is about 263.3697469629.

The spelling of 18268280 in words is "eighteen million, two hundred sixty-eight thousand, two hundred eighty".