6440475 has 24 divisors (see below), whose sum is σ = 10792960. Its totient is φ = 3388320.

The previous prime is 6440471. The next prime is 6440477. The reversal of 6440475 is 5740446.

It is not a de Polignac number, because 6440475 - 2² = 6440471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440471) 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, 5382 + ... + 6468.

Almost surely, 2^6440475 is an apocalyptic number.

6440475 is a deficient number, since it is larger than the sum of its proper divisors (4352485).

6440475 is a wasteful number, since it uses less digits than its factorization.

6440475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1174 counting only the distinct ones).

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

The square root of 6440475 is about 2537.8090944750. The cubic root of 6440475 is about 186.0541234561.

The spelling of 6440475 in words is "six million, four hundred forty thousand, four hundred seventy-five".