2218706040 has 128 divisors (see below), whose sum is σ = 7354229760. Its totient is φ = 532629504.

The previous prime is 2218706027. The next prime is 2218706069. The reversal of 2218706040 is 406078122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2218705989 and 2218706007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23277 + ... + 70563.

It is an arithmetic number, because the mean of its divisors is an integer number (57454920).

Almost surely, 2^2218706040 is an apocalyptic number.

2218706040 is a gapful number since it is divisible by the number (20) 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 2218706040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3677114880).

2218706040 is an abundant number, since it is smaller than the sum of its proper divisors (5135523720).

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

2218706040 is a wasteful number, since it uses less digits than its factorization.

2218706040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47341 (or 47337 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 2218706040 is about 47103.1425703211. The cubic root of 2218706040 is about 1304.2672476580.

The spelling of 2218706040 in words is "two billion, two hundred eighteen million, seven hundred six thousand, forty".