2218989240 has 96 divisors (see below), whose sum is σ = 7766478720. Its totient is φ = 546211584.

The previous prime is 2218989217. The next prime is 2218989251. The reversal of 2218989240 is 429898122.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 232392 + ... + 241751.

It is an arithmetic number, because the mean of its divisors is an integer number (80900820).

Almost surely, 2^2218989240 is an apocalyptic number.

2218989240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2218989240 is an abundant number, since it is smaller than the sum of its proper divisors (5547489480).

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

2218989240 is a wasteful number, since it uses less digits than its factorization.

2218989240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474173 (or 474166 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 2218989240 is about 47106.1486432504. The cubic root of 2218989240 is about 1304.3227383754.

The spelling of 2218989240 in words is "two billion, two hundred eighteen million, nine hundred eighty-nine thousand, two hundred forty".