1215632868 has 24 divisors (see below), whose sum is σ = 2845433472. Its totient is φ = 403931424.

The previous prime is 1215632867. The next prime is 1215632881. The reversal of 1215632868 is 8682365121.

It is not an unprimeable number, because it can be changed into a prime (1215632861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155980 + ... + 163587.

It is an arithmetic number, because the mean of its divisors is an integer number (118559728).

Almost surely, 2^1215632868 is an apocalyptic number.

It is an amenable number.

1215632868 is an abundant number, since it is smaller than the sum of its proper divisors (1629800604).

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

1215632868 is a wasteful number, since it uses less digits than its factorization.

1215632868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319891 (or 319889 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 1215632868 is about 34865.9270348574. The cubic root of 1215632868 is about 1067.2532302955.

Adding to 1215632868 its reverse (8682365121), we get a palindrome (9897997989).

The spelling of 1215632868 in words is "one billion, two hundred fifteen million, six hundred thirty-two thousand, eight hundred sixty-eight".