6440325 has 24 divisors (see below), whose sum is σ = 10901088. Its totient is φ = 3353280.

The previous prime is 6440311. The next prime is 6440327. The reversal of 6440325 is 5230446.

It is not a de Polignac number, because 6440325 - 2¹⁶ = 6374789 is a prime.

It is a super-2 number, since 2×6440325² = 82955572211250, which contains 22 as substring.

6440325 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6440295 and 6440304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2227 + ... + 4223.

It is an arithmetic number, because the mean of its divisors is an integer number (454212).

Almost surely, 2^6440325 is an apocalyptic number.

It is an amenable number.

6440325 is a deficient number, since it is larger than the sum of its proper divisors (4460763).

6440325 is a wasteful number, since it uses less digits than its factorization.

6440325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053 (or 2048 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 6440325 is about 2537.7795412525. The cubic root of 6440325 is about 186.0526790319.

The spelling of 6440325 in words is "six million, four hundred forty thousand, three hundred twenty-five".