263243400 has 192 divisors, whose sum is σ = 940118400. Its totient is φ = 59688960.

The previous prime is 263243359. The next prime is 263243401. The reversal of 263243400 is 4342362.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (263243401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 978466 + ... + 978734.

It is an arithmetic number, because the mean of its divisors is an integer number (4896450).

Almost surely, 2^263243400 is an apocalyptic number.

263243400 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 263243400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470059200).

263243400 is an abundant number, since it is smaller than the sum of its proper divisors (676875000).

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

263243400 is a wasteful number, since it uses less digits than its factorization.

263243400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 263243400 is about 16224.7773482412. Note that the first 3 decimals coincide. The cubic root of 263243400 is about 640.8934461706.

Adding to 263243400 its reverse (4342362), we get a palindrome (267585762).

The spelling of 263243400 in words is "two hundred sixty-three million, two hundred forty-three thousand, four hundred".