1263282240 has 448 divisors, whose sum is σ = 4803452928. Its totient is φ = 277708800.

The previous prime is 1263282239. The next prime is 1263282259. The reversal of 1263282240 is 422823621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1263282198 and 1263282207.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5565007 + ... + 5565233.

Almost surely, 2^1263282240 is an apocalyptic number.

1263282240 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 1263282240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2401726464).

1263282240 is an abundant number, since it is smaller than the sum of its proper divisors (3540170688).

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

1263282240 is a wasteful number, since it uses less digits than its factorization.

1263282240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1263282240 is about 35542.6819472026. The cubic root of 1263282240 is about 1081.0193393947.

The spelling of 1263282240 in words is "one billion, two hundred sixty-three million, two hundred eighty-two thousand, two hundred forty".