1226215584 has 240 divisors, whose sum is σ = 4072511520. Its totient is φ = 358525440.

The previous prime is 1226215561. The next prime is 1226215603. The reversal of 1226215584 is 4855126221.

1226215584 is a `hidden beast` number, since 1 + 2 + 2 + 62 + 15 + 584 = 666.

It is a super-2 number, since 2×1226215584² = 3007209316888922112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 826107 + ... + 827589.

It is an arithmetic number, because the mean of its divisors is an integer number (16968798).

Almost surely, 2^1226215584 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 1226215584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2036255760).

1226215584 is an abundant number, since it is smaller than the sum of its proper divisors (2846295936).

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

1226215584 is a wasteful number, since it uses less digits than its factorization.

1226215584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545 (or 1528 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 1226215584 is about 35017.3611798491. The cubic root of 1226215584 is about 1070.3412845591.

The spelling of 1226215584 in words is "one billion, two hundred twenty-six million, two hundred fifteen thousand, five hundred eighty-four".