18015480 has 128 divisors (see below), whose sum is σ = 68659200. Its totient is φ = 4116096.

The previous prime is 18015479. The next prime is 18015499. The reversal of 18015480 is 8451081.

18015480 is a `hidden beast` number, since 180 + 1 + 5 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6369 + ... + 8751.

It is an arithmetic number, because the mean of its divisors is an integer number (536400).

Almost surely, 2^18015480 is an apocalyptic number.

18015480 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 18015480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34329600).

18015480 is an abundant number, since it is smaller than the sum of its proper divisors (50643720).

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

18015480 is a wasteful number, since it uses less digits than its factorization.

18015480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2400 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 18015480 is about 4244.4646305512. The cubic root of 18015480 is about 262.1492458145.

The spelling of 18015480 in words is "eighteen million, fifteen thousand, four hundred eighty".