18798480 has 120 divisors (see below), whose sum is σ = 65537472. Its totient is φ = 5007744.

The previous prime is 18798473. The next prime is 18798487. The reversal of 18798480 is 8489781.

18798480 is a `hidden beast` number, since 1 + 87 + 98 + 480 = 666.

It is an interprime number because it is at equal distance from previous prime (18798473) and next prime (18798487).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18798487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18957 + ... + 19923.

Almost surely, 2^18798480 is an apocalyptic number.

18798480 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 18798480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32768736).

18798480 is an abundant number, since it is smaller than the sum of its proper divisors (46738992).

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

18798480 is an equidigital number, since it uses as much as digits as its factorization.

18798480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 18798480 is about 4335.7213932632. The cubic root of 18798480 is about 265.8934127389.

The spelling of 18798480 in words is "eighteen million, seven hundred ninety-eight thousand, four hundred eighty".