263859960 has 256 divisors, whose sum is σ = 990581760. Its totient is φ = 54743040.

The previous prime is 263859949. The next prime is 263859971. The reversal of 263859960 is 69958362.

It is an interprime number because it is at equal distance from previous prime (263859949) and next prime (263859971).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 796995 + ... + 797325.

It is an arithmetic number, because the mean of its divisors is an integer number (3869460).

Almost surely, 2^263859960 is an apocalyptic number.

263859960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263859960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (495290880).

263859960 is an abundant number, since it is smaller than the sum of its proper divisors (726721800).

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

263859960 is a wasteful number, since it uses less digits than its factorization.

263859960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 48.

The square root of 263859960 is about 16243.7668045315. The cubic root of 263859960 is about 641.3934158591.

The spelling of 263859960 in words is "two hundred sixty-three million, eight hundred fifty-nine thousand, nine hundred sixty".