2218769784 has 144 divisors (see below), whose sum is σ = 7625868120. Its totient is φ = 576293760.

The previous prime is 2218769737. The next prime is 2218769797. The reversal of 2218769784 is 4879678122.

It is a happy number.

It is a super-4 number, since 4×2218769784⁴ (a number of 38 digits) contains 4444 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 2218769784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10222 + ... + 67394.

Almost surely, 2^2218769784 is an apocalyptic number.

2218769784 is a gapful number since it is divisible by the number (24) 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 2218769784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3812934060).

2218769784 is an abundant number, since it is smaller than the sum of its proper divisors (5407098336).

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

2218769784 is a wasteful number, since it uses less digits than its factorization.

2218769784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57210 (or 57196 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 2218769784 is about 47103.8192082128. The cubic root of 2218769784 is about 1304.2797381838.

The spelling of 2218769784 in words is "two billion, two hundred eighteen million, seven hundred sixty-nine thousand, seven hundred eighty-four".