6253440 has 64 divisors (see below), whose sum is σ = 19938960. Its totient is φ = 1667072.

The previous prime is 6253411. The next prime is 6253441. The reversal of 6253440 is 443526.

6253440 is digitally balanced in base 4, 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 (64).

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

It is a self number, because there is not a number n which added to its sum of digits gives 6253440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6253441) 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, 292 + ... + 3548.

Almost surely, 2^6253440 is an apocalyptic number.

6253440 is a gapful number since it is divisible by the number (60) 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 6253440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9969480).

6253440 is an abundant number, since it is smaller than the sum of its proper divisors (13685520).

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

6253440 is a wasteful number, since it uses less digits than its factorization.

6253440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279 (or 3267 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 6253440 is about 2500.6879053572. The cubic root of 6253440 is about 184.2353635826.

Subtracting from 6253440 its sum of digits (24), we obtain a triangular number (6253416 = T₃₅₃₆).

Adding to 6253440 its reverse (443526), we get a palindrome (6696966).

The spelling of 6253440 in words is "six million, two hundred fifty-three thousand, four hundred forty".