4989438 has 40 divisors (see below), whose sum is σ = 11775720. Its totient is φ = 1574640.

The previous prime is 4989437. The next prime is 4989443. The reversal of 4989438 is 8349894.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4989393 and 4989402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4989431) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2268 + ... + 3888.

It is an arithmetic number, because the mean of its divisors is an integer number (294393).

Almost surely, 2^4989438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4989438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5887860).

4989438 is an abundant number, since it is smaller than the sum of its proper divisors (6786282).

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

4989438 is a wasteful number, since it uses less digits than its factorization.

4989438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654 (or 1645 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 4989438 is about 2233.7049939506. The cubic root of 4989438 is about 170.8771046805.

The spelling of 4989438 in words is "four million, nine hundred eighty-nine thousand, four hundred thirty-eight".