263142440 has 32 divisors (see below), whose sum is σ = 645896160. Its totient is φ = 95688000.

The previous prime is 263142437. The next prime is 263142449. The reversal of 263142440 is 44241362.

It is not an unprimeable number, because it can be changed into a prime (263142449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298586 + ... + 299465.

It is an arithmetic number, because the mean of its divisors is an integer number (20184255).

Almost surely, 2^263142440 is an apocalyptic number.

263142440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263142440 is an abundant number, since it is smaller than the sum of its proper divisors (382753720).

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

263142440 is a wasteful number, since it uses less digits than its factorization.

263142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598073 (or 598069 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 263142440 is about 16221.6657591013. The cubic root of 263142440 is about 640.8115031525.

The spelling of 263142440 in words is "two hundred sixty-three million, one hundred forty-two thousand, four hundred forty".