1263687480 has 384 divisors, whose sum is σ = 4755179520. Its totient is φ = 299220480.

The previous prime is 1263687479. The next prime is 1263687517. The reversal of 1263687480 is 847863621.

1263687480 is a `hidden beast` number, since 1 + 2 + 636 + 8 + 7 + 4 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5666649 + ... + 5666871.

It is an arithmetic number, because the mean of its divisors is an integer number (12383280).

Almost surely, 2^1263687480 is an apocalyptic number.

1263687480 is a gapful number since it is divisible by the number (10) 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 1263687480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2377589760).

1263687480 is an abundant number, since it is smaller than the sum of its proper divisors (3491492040).

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

1263687480 is a wasteful number, since it uses less digits than its factorization.

1263687480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 1263687480 is about 35548.3822416717. The cubic root of 1263687480 is about 1081.1349180646.

The spelling of 1263687480 in words is "one billion, two hundred sixty-three million, six hundred eighty-seven thousand, four hundred eighty".