4089042 has 40 divisors (see below), whose sum is σ = 9391536. Its totient is φ = 1329048.

The previous prime is 4089037. The next prime is 4089073. The reversal of 4089042 is 2409804.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 4088997 and 4089015.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6673 + ... + 7259.

Almost surely, 2^4089042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4089042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4695768).

4089042 is an abundant number, since it is smaller than the sum of its proper divisors (5302494).

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

4089042 is a wasteful number, since it uses less digits than its factorization.

4089042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 4089042 is about 2022.1379774882. The cubic root of 4089042 is about 159.9093496921.

The spelling of 4089042 in words is "four million, eighty-nine thousand, forty-two".