1022213664 has 72 divisors (see below), whose sum is σ = 2922296832. Its totient is φ = 338935680.

The previous prime is 1022213659. The next prime is 1022213711. The reversal of 1022213664 is 4663122201.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45717 + ... + 64299.

It is an arithmetic number, because the mean of its divisors is an integer number (40587456).

Almost surely, 2^1022213664 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 1022213664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1461148416).

1022213664 is an abundant number, since it is smaller than the sum of its proper divisors (1900083168).

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

1022213664 is a wasteful number, since it uses less digits than its factorization.

1022213664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18790 (or 18779 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1022213664 is about 31972.0763166861. The cubic root of 1022213664 is about 1007.3503939983.

Adding to 1022213664 its reverse (4663122201), we get a palindrome (5685335865).

The spelling of 1022213664 in words is "one billion, twenty-two million, two hundred thirteen thousand, six hundred sixty-four".