6440607 has 16 divisors (see below), whose sum is σ = 9588480. Its totient is φ = 4272696.

The previous prime is 6440587. The next prime is 6440641. The reversal of 6440607 is 7060446.

It is not a de Polignac number, because 6440607 - 2⁶ = 6440543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440647) 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, 6648 + ... + 7554.

It is an arithmetic number, because the mean of its divisors is an integer number (599280).

Almost surely, 2^6440607 is an apocalyptic number.

6440607 is a deficient number, since it is larger than the sum of its proper divisors (3147873).

6440607 is a wasteful number, since it uses less digits than its factorization.

6440607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 6440607 is about 2537.8351010261. The cubic root of 6440607 is about 186.0553945309.

The spelling of 6440607 in words is "six million, four hundred forty thousand, six hundred seven".