6454440 has 48 divisors (see below), whose sum is σ = 20978100. Its totient is φ = 1721088.

The previous prime is 6454439. The next prime is 6454451. The reversal of 6454440 is 444546.

It can be written as a sum of positive squares in 2 ways, for example, as 6441444 + 12996 = 2538^2 + 114^2 .

It is a nialpdrome in base 15.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 8605 + ... + 9324.

Almost surely, 2^6454440 is an apocalyptic number.

6454440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6454440 is an abundant number, since it is smaller than the sum of its proper divisors (14523660).

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

6454440 is a wasteful number, since it uses less digits than its factorization.

6454440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17946 (or 17939 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 6454440 is about 2540.5589936075. The cubic root of 6454440 is about 186.1885012337.

Adding to 6454440 its reverse (444546), we get a palindrome (6898986).

The spelling of 6454440 in words is "six million, four hundred fifty-four thousand, four hundred forty".