263640460 has 24 divisors (see below), whose sum is σ = 554641920. Its totient is φ = 105266304.

The previous prime is 263640431. The next prime is 263640469. The reversal of 263640460 is 64046362.

It is not an unprimeable number, because it can be changed into a prime (263640469) 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, 204 + ... + 22963.

It is an arithmetic number, because the mean of its divisors is an integer number (23110080).

Almost surely, 2^263640460 is an apocalyptic number.

263640460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263640460 is an abundant number, since it is smaller than the sum of its proper divisors (291001460).

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

263640460 is a wasteful number, since it uses less digits than its factorization.

263640460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23745 (or 23743 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 263640460 is about 16237.0089610125. The cubic root of 263640460 is about 641.2155122572.

The spelling of 263640460 in words is "two hundred sixty-three million, six hundred forty thousand, four hundred sixty".