1276630648 has 24 divisors (see below), whose sum is σ = 2407474440. Its totient is φ = 634658400.

The previous prime is 1276630637. The next prime is 1276630651. The reversal of 1276630648 is 8460366721.

It is a super-2 number, since 2×1276630648² = 3259571622825799808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 259653 + ... + 264523.

It is an arithmetic number, because the mean of its divisors is an integer number (100311435).

Almost surely, 2^1276630648 is an apocalyptic number.

It is an amenable number.

1276630648 is a deficient number, since it is larger than the sum of its proper divisors (1130843792).

1276630648 is an equidigital number, since it uses as much as digits as its factorization.

1276630648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5239 (or 5054 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 1276630648 is about 35729.9684858523. The cubic root of 1276630648 is about 1084.8135190280.

The spelling of 1276630648 in words is "one billion, two hundred seventy-six million, six hundred thirty thousand, six hundred forty-eight".