1263962880 has 360 divisors, whose sum is σ = 4612097952. Its totient is φ = 330448896.

The previous prime is 1263962867. The next prime is 1263962881. The reversal of 1263962880 is 882693621.

1263962880 is a `hidden beast` number, since 1 + 2 + 639 + 6 + 2 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

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

It is not an unprimeable number, because it can be changed into a prime (1263962881) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7568557 + ... + 7568723.

Almost surely, 2^1263962880 is an apocalyptic number.

1263962880 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 1263962880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2306048976).

1263962880 is an abundant number, since it is smaller than the sum of its proper divisors (3348135072).

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

1263962880 is an equidigital number, since it uses as much as digits as its factorization.

1263962880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1263962880 is about 35552.2556246436. The cubic root of 1263962880 is about 1081.2134509124.

The spelling of 1263962880 in words is "one billion, two hundred sixty-three million, nine hundred sixty-two thousand, eight hundred eighty".