1263360440 has 64 divisors (see below), whose sum is σ = 3033676800. Its totient is φ = 471840768.

The previous prime is 1263360377. The next prime is 1263360473. The reversal of 1263360440 is 440633621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79046 + ... + 93674.

It is an arithmetic number, because the mean of its divisors is an integer number (47401200).

Almost surely, 2^1263360440 is an apocalyptic number.

1263360440 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 1263360440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1516838400).

1263360440 is an abundant number, since it is smaller than the sum of its proper divisors (1770316360).

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

1263360440 is a wasteful number, since it uses less digits than its factorization.

1263360440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14784 (or 14780 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 1263360440 is about 35543.7820159870. The cubic root of 1263360440 is about 1081.0416447738.

The spelling of 1263360440 in words is "one billion, two hundred sixty-three million, three hundred sixty thousand, four hundred forty".