1276288648 has 16 divisors (see below), whose sum is σ = 2395961280. Its totient is φ = 637365648.

The previous prime is 1276288609. The next prime is 1276288661. The reversal of 1276288648 is 8468826721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1276288595 and 1276288604.

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, 90340 + ... + 103507.

It is an arithmetic number, because the mean of its divisors is an integer number (149747580).

Almost surely, 2^1276288648 is an apocalyptic number.

It is an amenable number.

1276288648 is a deficient number, since it is larger than the sum of its proper divisors (1119672632).

1276288648 is a wasteful number, since it uses less digits than its factorization.

1276288648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194676 (or 194672 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 52.

The square root of 1276288648 is about 35725.1822668548. The cubic root of 1276288648 is about 1084.7166391777.

The spelling of 1276288648 in words is "one billion, two hundred seventy-six million, two hundred eighty-eight thousand, six hundred forty-eight".