263640352 has 96 divisors (see below), whose sum is σ = 604195200. Its totient is φ = 112324608.

The previous prime is 263640331. The next prime is 263640361. The reversal of 263640352 is 253046362.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237174 + ... + 238282.

It is an arithmetic number, because the mean of its divisors is an integer number (6293700).

Almost surely, 2^263640352 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 263640352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302097600).

263640352 is an abundant number, since it is smaller than the sum of its proper divisors (340554848).

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

263640352 is a wasteful number, since it uses less digits than its factorization.

263640352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 263640352 is about 16237.0056352765. The cubic root of 263640352 is about 641.2154246994.

The spelling of 263640352 in words is "two hundred sixty-three million, six hundred forty thousand, three hundred fifty-two".