263623340 has 48 divisors (see below), whose sum is σ = 579247200. Its totient is φ = 100649472.

The previous prime is 263623313. The next prime is 263623343. The reversal of 263623340 is 43326362.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (263623343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49067 + ... + 54173.

It is an arithmetic number, because the mean of its divisors is an integer number (12067650).

Almost surely, 2^263623340 is an apocalyptic number.

263623340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263623340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289623600).

263623340 is an abundant number, since it is smaller than the sum of its proper divisors (315623860).

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

263623340 is a wasteful number, since it uses less digits than its factorization.

263623340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5234 (or 5232 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

The square root of 263623340 is about 16236.4817617611. The cubic root of 263623340 is about 641.2016324362.

The spelling of 263623340 in words is "two hundred sixty-three million, six hundred twenty-three thousand, three hundred forty".