6440672 has 24 divisors (see below), whose sum is σ = 14492016. Its totient is φ = 2760192.

The previous prime is 6440647. The next prime is 6440683. The reversal of 6440672 is 2760446.

It is a super-3 number, since 3×6440672³ (a number of 21 digits) contains 333 as substring.

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, 14153 + ... + 14600.

It is an arithmetic number, because the mean of its divisors is an integer number (603834).

Almost surely, 2^6440672 is an apocalyptic number.

It is an amenable number.

6440672 is an abundant number, since it is smaller than the sum of its proper divisors (8051344).

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

6440672 is a wasteful number, since it uses less digits than its factorization.

6440672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28770 (or 28762 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 6440672 is about 2537.8479071844. The cubic root of 6440672 is about 186.0560204326.

The spelling of 6440672 in words is "six million, four hundred forty thousand, six hundred seventy-two".