6440841 has 48 divisors (see below), whose sum is σ = 11119680. Its totient is φ = 3548160.

The previous prime is 6440831. The next prime is 6440873. The reversal of 6440841 is 1480446.

6440841 = 128³ + 129³ + 130³.

It is not a de Polignac number, because 6440841 - 2⁵ = 6440809 is a prime.

It is an Ulam number.

6440841 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6440821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72325 + ... + 72413.

It is an arithmetic number, because the mean of its divisors is an integer number (231660).

Almost surely, 2^6440841 is an apocalyptic number.

It is an amenable number.

6440841 is a deficient number, since it is larger than the sum of its proper divisors (4678839).

6440841 is a wasteful number, since it uses less digits than its factorization.

6440841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 6440841 is about 2537.8812028935. The cubic root of 6440841 is about 186.0576477572.

The spelling of 6440841 in words is "six million, four hundred forty thousand, eight hundred forty-one".