6440467 has 24 divisors (see below), whose sum is σ = 7814016. Its totient is φ = 5280000.

The previous prime is 6440459. The next prime is 6440471. The reversal of 6440467 is 7640446.

It is not a de Polignac number, because 6440467 - 2³ = 6440459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (6440477) 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, 63717 + ... + 63817.

It is an arithmetic number, because the mean of its divisors is an integer number (325584).

Almost surely, 2^6440467 is an apocalyptic number.

6440467 is a deficient number, since it is larger than the sum of its proper divisors (1373549).

6440467 is a wasteful number, since it uses less digits than its factorization.

6440467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 6440467 is about 2537.8075183118. The cubic root of 6440467 is about 186.0540464207.

The spelling of 6440467 in words is "six million, four hundred forty thousand, four hundred sixty-seven".