263361868 has 144 divisors (see below), whose sum is σ = 628798464. Its totient is φ = 95208960.

The previous prime is 263361863. The next prime is 263361913. The reversal of 263361868 is 868163362.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263361863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2330580 + ... + 2330692.

It is an arithmetic number, because the mean of its divisors is an integer number (4366656).

Almost surely, 2^263361868 is an apocalyptic number.

263361868 is a gapful number since it is divisible by the number (28) 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 263361868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314399232).

263361868 is an abundant number, since it is smaller than the sum of its proper divisors (365436596).

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

263361868 is a wasteful number, since it uses less digits than its factorization.

263361868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 203 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 263361868 is about 16228.4277735091. The cubic root of 263361868 is about 640.9895726426.

The spelling of 263361868 in words is "two hundred sixty-three million, three hundred sixty-one thousand, eight hundred sixty-eight".