263934240 has 48 divisors (see below), whose sum is σ = 831394368. Its totient is φ = 70382336.

The previous prime is 263934221. The next prime is 263934241. The reversal of 263934240 is 42439362.

263934240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×263934240² = 139322566088755200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (263934241) 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, 274452 + ... + 275411.

It is an arithmetic number, because the mean of its divisors is an integer number (17320716).

Almost surely, 2^263934240 is an apocalyptic number.

263934240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263934240 is an abundant number, since it is smaller than the sum of its proper divisors (567460128).

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

263934240 is a wasteful number, since it uses less digits than its factorization.

263934240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549881 (or 549873 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 263934240 is about 16246.0530591279. The cubic root of 263934240 is about 641.4535970665.

The spelling of 263934240 in words is "two hundred sixty-three million, nine hundred thirty-four thousand, two hundred forty".