4390649 has 4 divisors (see below), whose sum is σ = 4497780. Its totient is φ = 4283520.

The previous prime is 4390621. The next prime is 4390651. The reversal of 4390649 is 9460934.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 310249 + 4080400 = 557^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 4390649 - 2¹² = 4386553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4390619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53504 + ... + 53585.

It is an arithmetic number, because the mean of its divisors is an integer number (1124445).

Almost surely, 2^4390649 is an apocalyptic number.

It is an amenable number.

4390649 is a deficient number, since it is larger than the sum of its proper divisors (107131).

4390649 is a wasteful number, since it uses less digits than its factorization.

4390649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107130.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 4390649 is about 2095.3875536521. The cubic root of 4390649 is about 163.7480888614.

The spelling of 4390649 in words is "four million, three hundred ninety thousand, six hundred forty-nine".