1263855480 has 64 divisors (see below), whose sum is σ = 4014606240. Its totient is φ = 317202432.

The previous prime is 1263855473. The next prime is 1263855493. The reversal of 1263855480 is 845583621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307729 + ... + 311808.

Almost surely, 2^1263855480 is an apocalyptic number.

1263855480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263855480 is an abundant number, since it is smaller than the sum of its proper divisors (2750750760).

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

1263855480 is a wasteful number, since it uses less digits than its factorization.

1263855480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619568 (or 619564 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 1263855480 is about 35550.7451398701. The cubic root of 1263855480 is about 1081.1828261698.

The spelling of 1263855480 in words is "one billion, two hundred sixty-three million, eight hundred fifty-five thousand, four hundred eighty".