6457040 has 20 divisors (see below), whose sum is σ = 15012804. Its totient is φ = 2582784.

The previous prime is 6457027. The next prime is 6457079. The reversal of 6457040 is 407546.

It can be written as a sum of positive squares in 2 ways, for example, as 906304 + 5550736 = 952^2 + 2356^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40277 + ... + 40436.

Almost surely, 2^6457040 is an apocalyptic number.

It is an amenable number.

6457040 is an abundant number, since it is smaller than the sum of its proper divisors (8555764).

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

6457040 is a wasteful number, since it uses less digits than its factorization.

6457040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80726 (or 80720 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 6457040 is about 2541.0706404978. The cubic root of 6457040 is about 186.2134982444.

The spelling of 6457040 in words is "six million, four hundred fifty-seven thousand, forty".