6400465 has 8 divisors (see below), whose sum is σ = 7694568. Its totient is φ = 5111040.

The previous prime is 6400453. The next prime is 6400489. The reversal of 6400465 is 5640046.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1256641 + 5143824 = 1121^2 + 2268^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6400465 - 2¹¹ = 6398417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3679 + ... + 5131.

It is an arithmetic number, because the mean of its divisors is an integer number (961821).

Almost surely, 2^6400465 is an apocalyptic number.

It is an amenable number.

6400465 is a deficient number, since it is larger than the sum of its proper divisors (1294103).

6400465 is a wasteful number, since it uses less digits than its factorization.

6400465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 6400465 is about 2529.9140301599. The cubic root of 6400465 is about 185.6680497748.

The spelling of 6400465 in words is "six million, four hundred thousand, four hundred sixty-five".