263690444 has 6 divisors (see below), whose sum is σ = 461458284. Its totient is φ = 131845220.

The previous prime is 263690429. The next prime is 263690447. The reversal of 263690444 is 444096362.

263690444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 263690398 and 263690407.

It is not an unprimeable number, because it can be changed into a prime (263690447) 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 as a sum of consecutive naturals, namely, 32961302 + ... + 32961309.

It is an arithmetic number, because the mean of its divisors is an integer number (76909714).

Almost surely, 2^263690444 is an apocalyptic number.

It is an amenable number.

263690444 is a deficient number, since it is larger than the sum of its proper divisors (197767840).

263690444 is a wasteful number, since it uses less digits than its factorization.

263690444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65922615 (or 65922613 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 263690444 is about 16238.5480878064. The cubic root of 263690444 is about 641.2560327080.

The spelling of 263690444 in words is "two hundred sixty-three million, six hundred ninety thousand, four hundred forty-four".