263863494 has 96 divisors (see below), whose sum is σ = 635675040. Its totient is φ = 81741312.

The previous prime is 263863493. The next prime is 263863513. The reversal of 263863494 is 494368362.

263863494 is a `hidden beast` number, since 2 + 6 + 3 + 8 + 634 + 9 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263863493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 900412 + ... + 900704.

It is an arithmetic number, because the mean of its divisors is an integer number (6621615).

Almost surely, 2^263863494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263863494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317837520).

263863494 is an abundant number, since it is smaller than the sum of its proper divisors (371811546).

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

263863494 is a wasteful number, since it uses less digits than its factorization.

263863494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 424 counting only the distinct ones).

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

The square root of 263863494 is about 16243.8755843549. The cubic root of 263863494 is about 641.3962793404.

The spelling of 263863494 in words is "two hundred sixty-three million, eight hundred sixty-three thousand, four hundred ninety-four".