4399785 has 64 divisors (see below), whose sum is σ = 8870400. Its totient is φ = 2052864.

The previous prime is 4399771. The next prime is 4399789. The reversal of 4399785 is 5879934.

It is not a de Polignac number, because 4399785 - 2⁶ = 4399721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 4399785.

It is not an unprimeable number, because it can be changed into a prime (4399789) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40311 + ... + 40419.

It is an arithmetic number, because the mean of its divisors is an integer number (138600).

Almost surely, 2^4399785 is an apocalyptic number.

4399785 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4399785 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

4399785 is a wasteful number, since it uses less digits than its factorization.

4399785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 153 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 4399785 is about 2097.5664471001. The cubic root of 4399785 is about 163.8615850755.

It can be divided in two parts, 4399 and 785, that added together give a square (5184 = 72²).

The spelling of 4399785 in words is "four million, three hundred ninety-nine thousand, seven hundred eighty-five".