3989142 has 32 divisors (see below), whose sum is σ = 9154560. Its totient is φ = 1286280.

The previous prime is 3989137. The next prime is 3989147. The reversal of 3989142 is 2419893.

It is an interprime number because it is at equal distance from previous prime (3989137) and next prime (3989147).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3989097 and 3989106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483 + ... + 2865.

It is an arithmetic number, because the mean of its divisors is an integer number (286080).

Almost surely, 2^3989142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3989142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4577280).

3989142 is an abundant number, since it is smaller than the sum of its proper divisors (5165418).

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

3989142 is a wasteful number, since it uses less digits than its factorization.

3989142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425 (or 2419 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 3989142 is about 1997.2836553680. The cubic root of 3989142 is about 158.5963416977.

The spelling of 3989142 in words is "three million, nine hundred eighty-nine thousand, one hundred forty-two".