18879480 has 80 divisors (see below), whose sum is σ = 63466920. Its totient is φ = 5033664.

The previous prime is 18879473. The next prime is 18879491. The reversal of 18879480 is 8497881.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 327 + ... + 6153.

Almost surely, 2^18879480 is an apocalyptic number.

18879480 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 18879480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31733460).

18879480 is an abundant number, since it is smaller than the sum of its proper divisors (44587440).

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

18879480 is a wasteful number, since it uses less digits than its factorization.

18879480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850 (or 5837 counting only the distinct ones).

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

The square root of 18879480 is about 4345.0523587179. The cubic root of 18879480 is about 266.2747646078.

The spelling of 18879480 in words is "eighteen million, eight hundred seventy-nine thousand, four hundred eighty".