4390668 has 18 divisors (see below), whose sum is σ = 11098724. Its totient is φ = 1463544.

The previous prime is 4390667. The next prime is 4390697. The reversal of 4390668 is 8660934.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 121963 = 4390668 / (4 + 3 + 9 + 0 + 6 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (4390663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60946 + ... + 61017.

Almost surely, 2^4390668 is an apocalyptic number.

It is an amenable number.

4390668 is an abundant number, since it is smaller than the sum of its proper divisors (6708056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4390668 is a wasteful number, since it uses less digits than its factorization.

4390668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121973 (or 121968 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 4390668 is about 2095.3920874147. The cubic root of 4390668 is about 163.7483250610.

The spelling of 4390668 in words is "four million, three hundred ninety thousand, six hundred sixty-eight".