263897438 has 12 divisors (see below), whose sum is σ = 460474272. Its totient is φ = 113098860.

The previous prime is 263897437. The next prime is 263897467. The reversal of 263897438 is 834798362.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263897437) 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 5 ways as a sum of consecutive naturals, for example, 1346318 + ... + 1346513.

It is an arithmetic number, because the mean of its divisors is an integer number (38372856).

Almost surely, 2^263897438 is an apocalyptic number.

263897438 is a deficient number, since it is larger than the sum of its proper divisors (196576834).

263897438 is a wasteful number, since it uses less digits than its factorization.

263897438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692847 (or 2692840 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 263897438 is about 16244.9203753050. The cubic root of 263897438 is about 641.4237817199.

The spelling of 263897438 in words is "two hundred sixty-three million, eight hundred ninety-seven thousand, four hundred thirty-eight".