1215747768 has 32 divisors (see below), whose sum is σ = 3082181760. Its totient is φ = 399540960.

The previous prime is 1215747733. The next prime is 1215747811. The reversal of 1215747768 is 8677475121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355030 + ... + 358437.

It is an arithmetic number, because the mean of its divisors is an integer number (96318180).

Almost surely, 2^1215747768 is an apocalyptic number.

It is an amenable number.

1215747768 is an abundant number, since it is smaller than the sum of its proper divisors (1866433992).

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

1215747768 is a wasteful number, since it uses less digits than its factorization.

1215747768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713547 (or 713543 counting only the distinct ones).

The product of its digits is 658560, while the sum is 48.

The square root of 1215747768 is about 34867.5747364224. The cubic root of 1215747768 is about 1067.2868543543.

The spelling of 1215747768 in words is "one billion, two hundred fifteen million, seven hundred forty-seven thousand, seven hundred sixty-eight".