263485520 has 40 divisors (see below), whose sum is σ = 613294080. Its totient is φ = 105275520.

The previous prime is 263485489. The next prime is 263485529. The reversal of 263485520 is 25584362.

263485520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263485529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116561 + ... + 118799.

It is an arithmetic number, because the mean of its divisors is an integer number (15332352).

Almost surely, 2^263485520 is an apocalyptic number.

263485520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263485520 is an abundant number, since it is smaller than the sum of its proper divisors (349808560).

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

263485520 is a wasteful number, since it uses less digits than its factorization.

263485520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723 (or 3717 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 263485520 is about 16232.2370608613. The cubic root of 263485520 is about 641.0898747377.

The spelling of 263485520 in words is "two hundred sixty-three million, four hundred eighty-five thousand, five hundred twenty".