263560990 has 144 divisors (see below), whose sum is σ = 633892896. Its totient is φ = 77172480.

The previous prime is 263560967. The next prime is 263561003. The reversal of 263560990 is 99065362.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7123252 + ... + 7123288.

It is an arithmetic number, because the mean of its divisors is an integer number (4402034).

Almost surely, 2^263560990 is an apocalyptic number.

263560990 is an abundant number, since it is smaller than the sum of its proper divisors (370331906).

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

263560990 is a wasteful number, since it uses less digits than its factorization.

263560990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 263560990 is about 16234.5615893993. The cubic root of 263560990 is about 641.1510778912.

The spelling of 263560990 in words is "two hundred sixty-three million, five hundred sixty thousand, nine hundred ninety".