4390646 has 16 divisors (see below), whose sum is σ = 7245504. Its totient is φ = 1982784.

The previous prime is 4390621. The next prime is 4390651. The reversal of 4390646 is 6460934.

It is a Curzon number.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575 + ... + 3018.

It is an arithmetic number, because the mean of its divisors is an integer number (452844).

Almost surely, 2^4390646 is an apocalyptic number.

4390646 is a deficient number, since it is larger than the sum of its proper divisors (2854858).

4390646 is a wasteful number, since it uses less digits than its factorization.

4390646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 4390646 is about 2095.3868377939. The cubic root of 4390646 is about 163.7480515667.

The spelling of 4390646 in words is "four million, three hundred ninety thousand, six hundred forty-six".