263749434 has 32 divisors (see below), whose sum is σ = 568788864. Its totient is φ = 81051840.

The previous prime is 263749379. The next prime is 263749439. The reversal of 263749434 is 434947362.

It is a happy number.

263749434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (263749439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81324 + ... + 84504.

It is an arithmetic number, because the mean of its divisors is an integer number (17774652).

Almost surely, 2^263749434 is an apocalyptic number.

263749434 is an abundant number, since it is smaller than the sum of its proper divisors (305039430).

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

263749434 is a wasteful number, since it uses less digits than its factorization.

263749434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262.

The product of its digits is 435456, while the sum is 42.

The square root of 263749434 is about 16240.3643432036. The cubic root of 263749434 is about 641.3038474516.

The spelling of 263749434 in words is "two hundred sixty-three million, seven hundred forty-nine thousand, four hundred thirty-four".