4390816 has 24 divisors (see below), whose sum is σ = 8848224. Its totient is φ = 2143680.

The previous prime is 4390801. The next prime is 4390817. The reversal of 4390816 is 6180934.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4390817) 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, 220 + ... + 2971.

It is an arithmetic number, because the mean of its divisors is an integer number (368676).

Almost surely, 2^4390816 is an apocalyptic number.

It is an amenable number.

4390816 is an abundant number, since it is smaller than the sum of its proper divisors (4457408).

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

4390816 is a wasteful number, since it uses less digits than its factorization.

4390816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244 (or 3236 counting only the distinct ones).

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

The square root of 4390816 is about 2095.4274027033. The cubic root of 4390816 is about 163.7501649086.

The spelling of 4390816 in words is "four million, three hundred ninety thousand, eight hundred sixteen".