4489890 has 32 divisors (see below), whose sum is σ = 11344320. Its totient is φ = 1134144.

The previous prime is 4489883. The next prime is 4489897. The reversal of 4489890 is 989844.

It is an interprime number because it is at equal distance from previous prime (4489883) and next prime (4489897).

It is a super-2 number, since 2×4489890² = 40318224424200, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4⁹ + 4¹¹ + 8³ + 9² + 8⁵ + 9² + 0 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4489897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3369 + ... + 4508.

It is an arithmetic number, because the mean of its divisors is an integer number (354510).

Almost surely, 2^4489890 is an apocalyptic number.

4489890 is an abundant number, since it is smaller than the sum of its proper divisors (6854430).

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

4489890 is a wasteful number, since it uses less digits than its factorization.

4489890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7906.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 4489890 is about 2118.9360537779. The cubic root of 4489890 is about 164.9726309058.

The spelling of 4489890 in words is "four million, four hundred eighty-nine thousand, eight hundred ninety".