6263440 has 40 divisors (see below), whose sum is σ = 14820480. Its totient is φ = 2461056.

The previous prime is 6263437. The next prime is 6263441. The reversal of 6263440 is 443626.

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

It is not an unprimeable number, because it can be changed into a prime (6263441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4057 + ... + 5383.

It is an arithmetic number, because the mean of its divisors is an integer number (370512).

Almost surely, 2^6263440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6263440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7410240).

6263440 is an abundant number, since it is smaller than the sum of its proper divisors (8557040).

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

6263440 is a wasteful number, since it uses less digits than its factorization.

6263440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399 (or 1393 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 6263440 is about 2502.6865564829. The cubic root of 6263440 is about 184.3335160907. Note that the first 3 decimals are identical.

The spelling of 6263440 in words is "six million, two hundred sixty-three thousand, four hundred forty".