1280422216 has 16 divisors (see below), whose sum is σ = 2413233900. Its totient is φ = 636893184.

The previous prime is 1280422067. The next prime is 1280422229. The reversal of 1280422216 is 6122240821.

It can be written as a sum of positive squares in 2 ways, for example, as 995150116 + 285272100 = 31546^2 + 16890^2 .

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, 413101 + ... + 416188.

Almost surely, 2^1280422216 is an apocalyptic number.

It is an amenable number.

1280422216 is a deficient number, since it is larger than the sum of its proper divisors (1132811684).

1280422216 is a wasteful number, since it uses less digits than its factorization.

1280422216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829488 (or 829484 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 1280422216 is about 35782.9878014679. The cubic root of 1280422216 is about 1085.8864158628.

The spelling of 1280422216 in words is "one billion, two hundred eighty million, four hundred twenty-two thousand, two hundred sixteen".