263004240 has 40 divisors (see below), whose sum is σ = 815313888. Its totient is φ = 70134400.

The previous prime is 263004191. The next prime is 263004281. The reversal of 263004240 is 42400362.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 547686 + ... + 548165.

Almost surely, 2^263004240 is an apocalyptic number.

263004240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263004240 is an abundant number, since it is smaller than the sum of its proper divisors (552309648).

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

263004240 is a wasteful number, since it uses less digits than its factorization.

263004240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095867 (or 1095861 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 263004240 is about 16217.4054645002. The cubic root of 263004240 is about 640.6993007298.

The spelling of 263004240 in words is "two hundred sixty-three million, four thousand, two hundred forty".