4390689 has 4 divisors (see below), whose sum is σ = 5854256. Its totient is φ = 2927124.

The previous prime is 4390667. The next prime is 4390697. The reversal of 4390689 is 9860934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4390689 - 2⁵ = 4390657 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 13.

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, 731779 + ... + 731784.

It is an arithmetic number, because the mean of its divisors is an integer number (1463564).

Almost surely, 2^4390689 is an apocalyptic number.

It is an amenable number.

4390689 is a deficient number, since it is larger than the sum of its proper divisors (1463567).

4390689 is a wasteful number, since it uses less digits than its factorization.

4390689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463566.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 4390689 is about 2095.3970984040. The cubic root of 4390689 is about 163.7485861230.

The spelling of 4390689 in words is "four million, three hundred ninety thousand, six hundred eighty-nine".