4390320 has 80 divisors (see below), whose sum is σ = 14856192. Its totient is φ = 1063680.

The previous prime is 4390307. The next prime is 4390327. The reversal of 4390320 is 230934.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4390327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1809 + ... + 3471.

Almost surely, 2^4390320 is an apocalyptic number.

4390320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4390320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7428096).

4390320 is an abundant number, since it is smaller than the sum of its proper divisors (10465872).

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

4390320 is a wasteful number, since it uses less digits than its factorization.

4390320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 4390320 is about 2095.3090464177. The cubic root of 4390320 is about 163.7439987700.

The spelling of 4390320 in words is "four million, three hundred ninety thousand, three hundred twenty".