1263309696 has 480 divisors, whose sum is σ = 4432012200. Its totient is φ = 355829760.

The previous prime is 1263309689. The next prime is 1263309713. The reversal of 1263309696 is 6969033621.

It is a happy number.

1263309696 is a `hidden beast` number, since 1 + 2 + 633 + 0 + 9 + 6 + 9 + 6 = 666.

It is a super-2 number, since 2×1263309696² = 3191902776015224832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 23836006 + ... + 23836058.

Almost surely, 2^1263309696 is an apocalyptic number.

1263309696 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 1263309696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2216006100).

1263309696 is an abundant number, since it is smaller than the sum of its proper divisors (3168702504).

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

1263309696 is a wasteful number, since it uses less digits than its factorization.

1263309696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 1263309696 is about 35543.0681849499. The cubic root of 1263309696 is about 1081.0271709124.

The spelling of 1263309696 in words is "one billion, two hundred sixty-three million, three hundred nine thousand, six hundred ninety-six".