263494368 has 72 divisors (see below), whose sum is σ = 766774008. Its totient is φ = 85784832.

The previous prime is 263494367. The next prime is 263494369. The reversal of 263494368 is 863494362.

263494368 is a `hidden beast` number, since 2 + 634 + 9 + 4 + 3 + 6 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (263494367) and next prime (263494369).

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263494367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1746 + ... + 23022.

It is an arithmetic number, because the mean of its divisors is an integer number (10649639).

Almost surely, 2^263494368 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 263494368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383387004).

263494368 is an abundant number, since it is smaller than the sum of its proper divisors (503279640).

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

263494368 is a wasteful number, since it uses less digits than its factorization.

263494368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21336 (or 21325 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 263494368 is about 16232.5096026462. The cubic root of 263494368 is about 641.0970507168.

The spelling of 263494368 in words is "two hundred sixty-three million, four hundred ninety-four thousand, three hundred sixty-eight".