18280080 has 400 divisors, whose sum is σ = 80661504. Its totient is φ = 3732480.

The previous prime is 18280069. The next prime is 18280099. The reversal of 18280080 is 8008281.

It is a super-2 number, since 2×18280080² = 668322649612800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 589665 + ... + 589695.

Almost surely, 2^18280080 is an apocalyptic number.

18280080 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 18280080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40330752).

18280080 is an abundant number, since it is smaller than the sum of its proper divisors (62381424).

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

18280080 is a wasteful number, since it uses less digits than its factorization.

18280080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 18280080 is about 4275.5210208815. The cubic root of 18280080 is about 263.4264407535.

The spelling of 18280080 in words is "eighteen million, two hundred eighty thousand, eighty".