4028985 has 12 divisors (see below), whose sum is σ = 6983652. Its totient is φ = 2148768.

The previous prime is 4028963. The next prime is 4028987. The reversal of 4028985 is 5898204.

It can be written as a sum of positive squares in 2 ways, for example, as 2913849 + 1115136 = 1707^2 + 1056^2 .

It is not a de Polignac number, because 4028985 - 2⁵ = 4028953 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

4028985 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44722 + ... + 44811.

It is an arithmetic number, because the mean of its divisors is an integer number (581971).

Almost surely, 2^4028985 is an apocalyptic number.

4028985 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4028985 is a deficient number, since it is larger than the sum of its proper divisors (2954667).

4028985 is a wasteful number, since it uses less digits than its factorization.

4028985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89544 (or 89541 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 4028985 is about 2007.2331703118. The cubic root of 4028985 is about 159.1226062755.

The spelling of 4028985 in words is "four million, twenty-eight thousand, nine hundred eighty-five".