263891012 has 24 divisors (see below), whose sum is σ = 575762880. Its totient is φ = 102814560.

The previous prime is 263891009. The next prime is 263891021. The reversal of 263891012 is 210198362.

263891012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 263891012.

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, 428087 + ... + 428702.

It is an arithmetic number, because the mean of its divisors is an integer number (23990120).

Almost surely, 2^263891012 is an apocalyptic number.

263891012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

263891012 is an abundant number, since it is smaller than the sum of its proper divisors (311871868).

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

263891012 is a wasteful number, since it uses less digits than its factorization.

263891012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856811 (or 856809 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 263891012 is about 16244.7225891980. The cubic root of 263891012 is about 641.4185753757.

The spelling of 263891012 in words is "two hundred sixty-three million, eight hundred ninety-one thousand, twelve".