6440574 has 32 divisors (see below), whose sum is σ = 14895360. Its totient is φ = 1818432.

The previous prime is 6440561. The next prime is 6440579. The reversal of 6440574 is 4750446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2877 + ... + 4599.

It is an arithmetic number, because the mean of its divisors is an integer number (465480).

Almost surely, 2^6440574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6440574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7447680).

6440574 is an abundant number, since it is smaller than the sum of its proper divisors (8454786).

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

6440574 is a wasteful number, since it uses less digits than its factorization.

6440574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 6440574 is about 2537.8285994133. The cubic root of 6440574 is about 186.0550767639.

The spelling of 6440574 in words is "six million, four hundred forty thousand, five hundred seventy-four".