1263286720 has 28 divisors (see below), whose sum is σ = 3008202264. Its totient is φ = 505314560.

The previous prime is 1263286699. The next prime is 1263286721. The reversal of 1263286720 is 276823621.

It is a self number, because there is not a number n which added to its sum of digits gives 1263286720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263286721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1973566 + ... + 1974205.

Almost surely, 2^1263286720 is an apocalyptic number.

1263286720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263286720 is an abundant number, since it is smaller than the sum of its proper divisors (1744915544).

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

1263286720 is an equidigital number, since it uses as much as digits as its factorization.

1263286720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947788 (or 3947778 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 1263286720 is about 35542.7449699654. The cubic root of 1263286720 is about 1081.0206172724.

The spelling of 1263286720 in words is "one billion, two hundred sixty-three million, two hundred eighty-six thousand, seven hundred twenty".