18789480 has 192 divisors, whose sum is σ = 66830400. Its totient is φ = 4561920.

The previous prime is 18789479. The next prime is 18789481. The reversal of 18789480 is 8498781.

It is an interprime number because it is at equal distance from previous prime (18789479) and next prime (18789481).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 (18789481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 280407 + ... + 280473.

It is an arithmetic number, because the mean of its divisors is an integer number (348075).

Almost surely, 2^18789480 is an apocalyptic number.

18789480 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 18789480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33415200).

18789480 is an abundant number, since it is smaller than the sum of its proper divisors (48040920).

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

18789480 is a wasteful number, since it uses less digits than its factorization.

18789480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 137 counting only the distinct ones).

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

The square root of 18789480 is about 4334.6833794408. The cubic root of 18789480 is about 265.8509727346.

The spelling of 18789480 in words is "eighteen million, seven hundred eighty-nine thousand, four hundred eighty".