4390440 has 32 divisors (see below), whose sum is σ = 13171680. Its totient is φ = 1170752.

The previous prime is 4390433. The next prime is 4390453. The reversal of 4390440 is 440934.

4390440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 4390440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18174 + ... + 18413.

It is an arithmetic number, because the mean of its divisors is an integer number (411615).

Almost surely, 2^4390440 is an apocalyptic number.

4390440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4390440 is an abundant number, since it is smaller than the sum of its proper divisors (8781240).

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

4390440 is a wasteful number, since it uses less digits than its factorization.

4390440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36601 (or 36597 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 4390440 is about 2095.3376816160. The cubic root of 4390440 is about 163.7454906203.

The spelling of 4390440 in words is "four million, three hundred ninety thousand, four hundred forty".