1215833568 has 96 divisors (see below), whose sum is σ = 3270982176. Its totient is φ = 395286528.

The previous prime is 1215833561. The next prime is 1215833569. The reversal of 1215833568 is 8653385121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1215833568² = 2956502530151221248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215833561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1001730 + ... + 1002942.

It is an arithmetic number, because the mean of its divisors is an integer number (34072731).

Almost surely, 2^1215833568 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 1215833568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1635491088).

1215833568 is an abundant number, since it is smaller than the sum of its proper divisors (2055148608).

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

1215833568 is a wasteful number, since it uses less digits than its factorization.

1215833568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476 (or 1468 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 1215833568 is about 34868.8050842010. The cubic root of 1215833568 is about 1067.3119612776.

The spelling of 1215833568 in words is "one billion, two hundred fifteen million, eight hundred thirty-three thousand, five hundred sixty-eight".