1215966976 has 36 divisors (see below), whose sum is σ = 2773928752. Its totient is φ = 521127936.

The previous prime is 1215966923. The next prime is 1215966989. The reversal of 1215966976 is 6796695121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337485 + ... + 341068.

Almost surely, 2^1215966976 is an apocalyptic number.

1215966976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1215966976 is an abundant number, since it is smaller than the sum of its proper divisors (1557961776).

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

1215966976 is an frugal number, since it uses more digits than its factorization.

1215966976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678576 (or 678562 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 52.

The square root of 1215966976 is about 34870.7180310357. The cubic root of 1215966976 is about 1067.3509969785.

The spelling of 1215966976 in words is "one billion, two hundred fifteen million, nine hundred sixty-six thousand, nine hundred seventy-six".