2218570398 has 40 divisors (see below), whose sum is σ = 5423176440. Its totient is φ = 672293520.

The previous prime is 2218570391. The next prime is 2218570411. The reversal of 2218570398 is 8930758122.

It is a happy number.

It is a super-2 number, since 2×2218570398² = 9844109221763756808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218570391) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 620713 + ... + 624276.

It is an arithmetic number, because the mean of its divisors is an integer number (135579411).

Almost surely, 2^2218570398 is an apocalyptic number.

2218570398 is an abundant number, since it is smaller than the sum of its proper divisors (3204606042).

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

2218570398 is a wasteful number, since it uses less digits than its factorization.

2218570398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245014 (or 1245005 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 2218570398 is about 47101.7027080763. The cubic root of 2218570398 is about 1304.2406680480.

The spelling of 2218570398 in words is "two billion, two hundred eighteen million, five hundred seventy thousand, three hundred ninety-eight".