263982440 has 16 divisors (see below), whose sum is σ = 593960580. Its totient is φ = 105592960.

The previous prime is 263982427. The next prime is 263982449. The reversal of 263982440 is 44289362.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 258116356 + 5866084 = 16066^2 + 2422^2 .

It is a junction number, because it is equal to n+sod(n) for n = 263982394 and 263982403.

It is not an unprimeable number, because it can be changed into a prime (263982449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3299741 + ... + 3299820.

Almost surely, 2^263982440 is an apocalyptic number.

263982440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263982440 is an abundant number, since it is smaller than the sum of its proper divisors (329978140).

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

263982440 is a wasteful number, since it uses less digits than its factorization.

263982440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6599572 (or 6599568 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 263982440 is about 16247.5364286405. The cubic root of 263982440 is about 641.4926423750.

The spelling of 263982440 in words is "two hundred sixty-three million, nine hundred eighty-two thousand, four hundred forty".