263916890 has 16 divisors (see below), whose sum is σ = 475537608. Its totient is φ = 105458496.

The previous prime is 263916871. The next prime is 263916899. The reversal of 263916890 is 98619362.

263916890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 167935681 + 95981209 = 12959^2 + 9797^2 .

It is not an unprimeable number, because it can be changed into a prime (263916899) 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 7 ways as a sum of consecutive naturals, for example, 2897 + ... + 23156.

Almost surely, 2^263916890 is an apocalyptic number.

263916890 is a deficient number, since it is larger than the sum of its proper divisors (211620718).

263916890 is a wasteful number, since it uses less digits than its factorization.

263916890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27073.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 263916890 is about 16245.5190745017. The cubic root of 263916890 is about 641.4395412121.

The spelling of 263916890 in words is "two hundred sixty-three million, nine hundred sixteen thousand, eight hundred ninety".