18494280 has 192 divisors, whose sum is σ = 70761600. Its totient is φ = 4101120.

The previous prime is 18494279. The next prime is 18494299. The reversal of 18494280 is 8249481.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103231 + ... + 103409.

It is an arithmetic number, because the mean of its divisors is an integer number (368550).

Almost surely, 2^18494280 is an apocalyptic number.

18494280 is a gapful number since it is divisible by the number (10) 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 18494280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

18494280 is an abundant number, since it is smaller than the sum of its proper divisors (52267320).

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

18494280 is a wasteful number, since it uses less digits than its factorization.

18494280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18494280 is about 4300.4976456220. The cubic root of 18494280 is about 264.4513628479.

The spelling of 18494280 in words is "eighteen million, four hundred ninety-four thousand, two hundred eighty".