18979488 has 96 divisors (see below), whose sum is σ = 60419520. Its totient is φ = 5748480.

The previous prime is 18979487. The next prime is 18979511. The reversal of 18979488 is 88497981.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18979487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8506 + ... + 10502.

It is an arithmetic number, because the mean of its divisors is an integer number (629370).

Almost surely, 2^18979488 is an apocalyptic number.

18979488 is a gapful number since it is divisible by the number (18) 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 18979488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30209760).

18979488 is an abundant number, since it is smaller than the sum of its proper divisors (41440032).

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

18979488 is a wasteful number, since it uses less digits than its factorization.

18979488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2013 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 18979488 is about 4356.5454203991. The cubic root of 18979488 is about 266.7441052878.

The spelling of 18979488 in words is "eighteen million, nine hundred seventy-nine thousand, four hundred eighty-eight".