6390705 has 16 divisors (see below), whose sum is σ = 10356480. Its totient is φ = 3364608.

The previous prime is 6390697. The next prime is 6390719. The reversal of 6390705 is 5070936.

It is not a de Polignac number, because 6390705 - 2³ = 6390697 is a prime.

It is a super-2 number, since 2×6390705² = 81682220794050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1512 + ... + 3881.

It is an arithmetic number, because the mean of its divisors is an integer number (647280).

Almost surely, 2^6390705 is an apocalyptic number.

It is an amenable number.

6390705 is a deficient number, since it is larger than the sum of its proper divisors (3965775).

6390705 is a wasteful number, since it uses less digits than its factorization.

6390705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5480.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 6390705 is about 2527.9843749517. The cubic root of 6390705 is about 185.5736273622.

The spelling of 6390705 in words is "six million, three hundred ninety thousand, seven hundred five".