3989430 has 48 divisors (see below), whose sum is σ = 10923120. Its totient is φ = 1007424.

The previous prime is 3989429. The next prime is 3989431. The reversal of 3989430 is 349893.

It is an interprime number because it is at equal distance from previous prime (3989429) and next prime (3989431).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 544 + ... + 2876.

It is an arithmetic number, because the mean of its divisors is an integer number (227565).

Almost surely, 2^3989430 is an apocalyptic number.

3989430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3989430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5461560).

3989430 is an abundant number, since it is smaller than the sum of its proper divisors (6933690).

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

3989430 is a wasteful number, since it uses less digits than its factorization.

3989430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365 (or 2362 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3989430 is about 1997.3557519881. The cubic root of 3989430 is about 158.6001582784.

The spelling of 3989430 in words is "three million, nine hundred eighty-nine thousand, four hundred thirty".