1822219868 has 72 divisors (see below), whose sum is σ = 3928835232. Its totient is φ = 721778688.

The previous prime is 1822219829. The next prime is 1822219907. The reversal of 1822219868 is 8689122281.

It is an interprime number because it is at equal distance from previous prime (1822219829) and next prime (1822219907).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7957178 + ... + 7957406.

It is an arithmetic number, because the mean of its divisors is an integer number (54567156).

Almost surely, 2^1822219868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1822219868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1964417616).

1822219868 is an abundant number, since it is smaller than the sum of its proper divisors (2106615364).

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

1822219868 is a wasteful number, since it uses less digits than its factorization.

1822219868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 328 counting only the distinct ones).

The product of its digits is 221184, while the sum is 47.

The square root of 1822219868 is about 42687.4673411295. The cubic root of 1822219868 is about 1221.4253402909.

The spelling of 1822219868 in words is "one billion, eight hundred twenty-two million, two hundred nineteen thousand, eight hundred sixty-eight".