6453240 has 32 divisors (see below), whose sum is σ = 19360080. Its totient is φ = 1720832.

The previous prime is 6453221. The next prime is 6453247. The reversal of 6453240 is 423546.

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

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 6453240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6453247) 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, 26769 + ... + 27008.

Almost surely, 2^6453240 is an apocalyptic number.

6453240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6453240 is an abundant number, since it is smaller than the sum of its proper divisors (12906840).

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

6453240 is a wasteful number, since it uses less digits than its factorization.

6453240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53791 (or 53787 counting only the distinct ones).

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

The square root of 6453240 is about 2540.3228141321. The cubic root of 6453240 is about 186.1769618877.

Adding to 6453240 its reverse (423546), we get a palindrome (6876786).

The spelling of 6453240 in words is "six million, four hundred fifty-three thousand, two hundred forty".