4390655 has 4 divisors (see below), whose sum is σ = 5268792. Its totient is φ = 3512520.

The previous prime is 4390651. The next prime is 4390657. The reversal of 4390655 is 5560934.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5560934 = 2 ⋅2780467.

It is not a de Polignac number, because 4390655 - 2² = 4390651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4390651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439061 + ... + 439070.

It is an arithmetic number, because the mean of its divisors is an integer number (1317198).

Almost surely, 2^4390655 is an apocalyptic number.

4390655 is a deficient number, since it is larger than the sum of its proper divisors (878137).

4390655 is an equidigital number, since it uses as much as digits as its factorization.

4390655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878136.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 4390655 is about 2095.3889853676. The cubic root of 4390655 is about 163.7481634508.

The spelling of 4390655 in words is "four million, three hundred ninety thousand, six hundred fifty-five".