6459240 has 64 divisors (see below), whose sum is σ = 20404800. Its totient is φ = 1631232.

The previous prime is 6459239. The next prime is 6459247. The reversal of 6459240 is 429546.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6459198 and 6459207.

It is not an unprimeable number, because it can be changed into a prime (6459247) 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 15 ways as a sum of consecutive naturals, for example, 864 + ... + 3696.

It is an arithmetic number, because the mean of its divisors is an integer number (318825).

Almost surely, 2^6459240 is an apocalyptic number.

6459240 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 6459240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10202400).

6459240 is an abundant number, since it is smaller than the sum of its proper divisors (13945560).

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

6459240 is a wasteful number, since it uses less digits than its factorization.

6459240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866 (or 2862 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 6459240 is about 2541.5034920299. The cubic root of 6459240 is about 186.2346443205.

The spelling of 6459240 in words is "six million, four hundred fifty-nine thousand, two hundred forty".