2456440 has 64 divisors (see below), whose sum is σ = 6543360. Its totient is φ = 812160.

The previous prime is 2456437. The next prime is 2456459. The reversal of 2456440 is 446542.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8539 + ... + 8821.

It is an arithmetic number, because the mean of its divisors is an integer number (102240).

2^2456440 is an apocalyptic number.

2456440 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 2456440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3271680).

2456440 is an abundant number, since it is smaller than the sum of its proper divisors (4086920).

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

2456440 is a wasteful number, since it uses less digits than its factorization.

2456440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2456440 is about 1567.3034167002. The cubic root of 2456440 is about 134.9279908609.

The spelling of 2456440 in words is "two million, four hundred fifty-six thousand, four hundred forty".