263920064 has 42 divisors (see below), whose sum is σ = 533305512. Its totient is φ = 129561600.

The previous prime is 263920057. The next prime is 263920073. The reversal of 263920064 is 460029362.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 263920064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1094984 + ... + 1095224.

Almost surely, 2^263920064 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 263920064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266652756).

263920064 is an abundant number, since it is smaller than the sum of its proper divisors (269385448).

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

263920064 is an frugal number, since it uses more digits than its factorization.

263920064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 263920064 is about 16245.6167626840. The cubic root of 263920064 is about 641.4421126288.

The spelling of 263920064 in words is "two hundred sixty-three million, nine hundred twenty thousand, sixty-four".