1276312464 has 200 divisors, whose sum is σ = 4245531840. Its totient is φ = 362610432.

The previous prime is 1276312459. The next prime is 1276312483. The reversal of 1276312464 is 4642136721.

1276312464 is a `hidden beast` number, since 12 + 7 + 631 + 2 + 4 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2440107 + ... + 2440629.

Almost surely, 2^1276312464 is an apocalyptic number.

1276312464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276312464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2122765920).

1276312464 is an abundant number, since it is smaller than the sum of its proper divisors (2969219376).

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

1276312464 is a wasteful number, since it uses less digits than its factorization.

1276312464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 804 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 1276312464 is about 35725.5155876021. The cubic root of 1276312464 is about 1084.7233862018.

The spelling of 1276312464 in words is "one billion, two hundred seventy-six million, three hundred twelve thousand, four hundred sixty-four".