1247876976 has 80 divisors (see below), whose sum is σ = 3523488768. Its totient is φ = 378854400.

The previous prime is 1247876957. The next prime is 1247877013. The reversal of 1247876976 is 6796787421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631 + ... + 49961.

Almost surely, 2^1247876976 is an apocalyptic number.

1247876976 is a gapful number since it is divisible by the number (16) 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 1247876976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1761744384).

1247876976 is an abundant number, since it is smaller than the sum of its proper divisors (2275611792).

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

1247876976 is a wasteful number, since it uses less digits than its factorization.

1247876976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49390 (or 49384 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 57.

The square root of 1247876976 is about 35325.3022067752. The cubic root of 1247876976 is about 1076.6071438859.

The spelling of 1247876976 in words is "one billion, two hundred forty-seven million, eight hundred seventy-six thousand, nine hundred seventy-six".