2221869690 has 160 divisors (see below), whose sum is σ = 6563272320. Its totient is φ = 536823936.

The previous prime is 2221869679. The next prime is 2221869691. The reversal of 2221869690 is 969681222.

It is a super-2 number, since 2×2221869690² = 9873409838681392200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2221869691) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 350832 + ... + 357108.

It is an arithmetic number, because the mean of its divisors is an integer number (41020452).

Almost surely, 2^2221869690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221869690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3281636160).

2221869690 is an abundant number, since it is smaller than the sum of its proper divisors (4341402630).

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

2221869690 is a wasteful number, since it uses less digits than its factorization.

2221869690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6338 (or 6329 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 2221869690 is about 47136.7127619226. The cubic root of 2221869690 is about 1304.8868708908.

The spelling of 2221869690 in words is "two billion, two hundred twenty-one million, eight hundred sixty-nine thousand, six hundred ninety".