4390861 has 12 divisors (see below), whose sum is σ = 4766112. Its totient is φ = 4037264.

The previous prime is 4390849. The next prime is 4390873. The reversal of 4390861 is 1680934.

It is an interprime number because it is at equal distance from previous prime (4390849) and next prime (4390873).

It is not a de Polignac number, because 4390861 - 2⁵ = 4390829 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 (4390801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19230 + ... + 19456.

It is an arithmetic number, because the mean of its divisors is an integer number (397176).

Almost surely, 2^4390861 is an apocalyptic number.

It is an amenable number.

4390861 is a deficient number, since it is larger than the sum of its proper divisors (375251).

4390861 is a wasteful number, since it uses less digits than its factorization.

4390861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 4390861 is about 2095.4381403420. The cubic root of 4390861 is about 163.7507243136.

The spelling of 4390861 in words is "four million, three hundred ninety thousand, eight hundred sixty-one".