263745740 has 24 divisors (see below), whose sum is σ = 554754480. Its totient is φ = 105329088.

The previous prime is 263745739. The next prime is 263745763. The reversal of 263745740 is 47547362.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 263745694 and 263745703.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2606 + ... + 23114.

It is an arithmetic number, because the mean of its divisors is an integer number (23114770).

Almost surely, 2^263745740 is an apocalyptic number.

263745740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263745740 is an abundant number, since it is smaller than the sum of its proper divisors (291008740).

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

263745740 is a wasteful number, since it uses less digits than its factorization.

263745740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21161 (or 21159 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 38.

The square root of 263745740 is about 16240.2506138298. The cubic root of 263745740 is about 641.3008534642.

The spelling of 263745740 in words is "two hundred sixty-three million, seven hundred forty-five thousand, seven hundred forty".