263956264 has 64 divisors (see below), whose sum is σ = 585144000. Its totient is φ = 110046720.

The previous prime is 263956243. The next prime is 263956279. The reversal of 263956264 is 462659362.

It is a self number, because there is not a number n which added to its sum of digits gives 263956264.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204132 + ... + 205420.

It is an arithmetic number, because the mean of its divisors is an integer number (9142875).

Almost surely, 2^263956264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263956264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292572000).

263956264 is an abundant number, since it is smaller than the sum of its proper divisors (321187736).

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

263956264 is a wasteful number, since it uses less digits than its factorization.

263956264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498 (or 1494 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The square root of 263956264 is about 16246.7308711630. The cubic root of 263956264 is about 641.4714386080.

The spelling of 263956264 in words is "two hundred sixty-three million, nine hundred fifty-six thousand, two hundred sixty-four".