1222115328 has 240 divisors, whose sum is σ = 4143968400. Its totient is φ = 339738624.

The previous prime is 1222115273. The next prime is 1222115333. The reversal of 1222115328 is 8235112221.

1222115328 is a `hidden beast` number, since 1 + 222 + 115 + 328 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33030126 + ... + 33030162.

It is an arithmetic number, because the mean of its divisors is an integer number (17266535).

Almost surely, 2^1222115328 is an apocalyptic number.

1222115328 is a gapful number since it is divisible by the number (18) 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 1222115328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2071984200).

1222115328 is an abundant number, since it is smaller than the sum of its proper divisors (2921853072).

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

1222115328 is an frugal number, since it uses more digits than its factorization.

1222115328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 49 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1222115328 is about 34958.7661109485. The cubic root of 1222115328 is about 1069.1469393728.

Adding to 1222115328 its reverse (8235112221), we get a palindrome (9457227549).

The spelling of 1222115328 in words is "one billion, two hundred twenty-two million, one hundred fifteen thousand, three hundred twenty-eight".