1064221620 has 288 divisors, whose sum is σ = 3838162944. Its totient is φ = 215550720.

The previous prime is 1064221619. The next prime is 1064221633. The reversal of 1064221620 is 261224601.

It is a super-2 number, since 2×1064221620² = 2265135312950848800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2185017 + ... + 2185503.

Almost surely, 2^1064221620 is an apocalyptic number.

1064221620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1064221620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1919081472).

1064221620 is an abundant number, since it is smaller than the sum of its proper divisors (2773941324).

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

1064221620 is a wasteful number, since it uses less digits than its factorization.

1064221620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1064221620 is about 32622.4097822341. The cubic root of 1064221620 is about 1020.9646199532.

The spelling of 1064221620 in words is "one billion, sixty-four million, two hundred twenty-one thousand, six hundred twenty".