2206440640 has 56 divisors (see below), whose sum is σ = 5435285040. Its totient is φ = 852139008.

The previous prime is 2206440631. The next prime is 2206440671. The reversal of 2206440640 is 460446022.

It is a super-3 number, since 3×2206440640³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2206440599 and 2206440608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109602 + ... + 128161.

Almost surely, 2^2206440640 is an apocalyptic number.

2206440640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2206440640 is an abundant number, since it is smaller than the sum of its proper divisors (3228844400).

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

2206440640 is a wasteful number, since it uses less digits than its factorization.

2206440640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237809 (or 237799 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 2206440640 is about 46972.7648749784. The cubic root of 2206440640 is about 1301.8593983941.

Adding to 2206440640 its reverse (460446022), we get a palindrome (2666886662).

The spelling of 2206440640 in words is "two billion, two hundred six million, four hundred forty thousand, six hundred forty".