263561872 has 40 divisors (see below), whose sum is σ = 587222336. Its totient is φ = 112254336.

The previous prime is 263561861. The next prime is 263561887. The reversal of 263561872 is 278165362.

263561872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11038 + ... + 25474.

Almost surely, 2^263561872 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 263561872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293611168).

263561872 is an abundant number, since it is smaller than the sum of its proper divisors (323660464).

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

263561872 is a wasteful number, since it uses less digits than its factorization.

263561872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14615 (or 14609 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 263561872 is about 16234.5887536457. The cubic root of 263561872 is about 641.1517930888.

The spelling of 263561872 in words is "two hundred sixty-three million, five hundred sixty-one thousand, eight hundred seventy-two".