6450440 has 32 divisors (see below), whose sum is σ = 14636160. Its totient is φ = 2558400.

The previous prime is 6450439. The next prime is 6450467. The reversal of 6450440 is 440546.

It is a happy number.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4625 + ... + 5855.

It is an arithmetic number, because the mean of its divisors is an integer number (457380).

Almost surely, 2^6450440 is an apocalyptic number.

It is an amenable number.

6450440 is an abundant number, since it is smaller than the sum of its proper divisors (8185720).

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

6450440 is a wasteful number, since it uses less digits than its factorization.

6450440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1369 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 6450440 is about 2539.7716432782. The cubic root of 6450440 is about 186.1500311828.

Adding to 6450440 its reverse (440546), we get a palindrome (6890986).

The spelling of 6450440 in words is "six million, four hundred fifty thousand, four hundred forty".