2220022640 has 40 divisors (see below), whose sum is σ = 5630786928. Its totient is φ = 807280640.

The previous prime is 2220022631. The next prime is 2220022657. The reversal of 2220022640 is 462200222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2220022640² = 9857001044225139200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 1260497 + ... + 1262256.

Almost surely, 2^2220022640 is an apocalyptic number.

2220022640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220022640 is an abundant number, since it is smaller than the sum of its proper divisors (3410764288).

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

2220022640 is a wasteful number, since it uses less digits than its factorization.

2220022640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522777 (or 2522771 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2220022640 is about 47117.1162105662. The cubic root of 2220022640 is about 1304.5251845924.

Adding to 2220022640 its reverse (462200222), we get a palindrome (2682222862).

The spelling of 2220022640 in words is "two billion, two hundred twenty million, twenty-two thousand, six hundred forty".