1247446680 has 32 divisors (see below), whose sum is σ = 3742340400. Its totient is φ = 332652416.

The previous prime is 1247446679. The next prime is 1247446763. The reversal of 1247446680 is 866447421.

It is a super-2 number, since 2×1247446680² = 3112246438886044800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 5197575 + ... + 5197814.

Almost surely, 2^1247446680 is an apocalyptic number.

1247446680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1247446680 is an abundant number, since it is smaller than the sum of its proper divisors (2494893720).

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

1247446680 is a wasteful number, since it uses less digits than its factorization.

1247446680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10395403 (or 10395399 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The square root of 1247446680 is about 35319.2112029700. The cubic root of 1247446680 is about 1076.4833835542.

The spelling of 1247446680 in words is "one billion, two hundred forty-seven million, four hundred forty-six thousand, six hundred eighty".