263960338 has 4 divisors (see below), whose sum is σ = 395940510. Its totient is φ = 131980168.

The previous prime is 263960327. The next prime is 263960371. The reversal of 263960338 is 833069362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 263315529 + 644809 = 16227^2 + 803^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 263960338.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65990083 + ... + 65990086.

Almost surely, 2^263960338 is an apocalyptic number.

263960338 is a deficient number, since it is larger than the sum of its proper divisors (131980172).

263960338 is a wasteful number, since it uses less digits than its factorization.

263960338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131980171.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 263960338 is about 16246.8562497487. The cubic root of 263960338 is about 641.4747388280.

The spelling of 263960338 in words is "two hundred sixty-three million, nine hundred sixty thousand, three hundred thirty-eight".