4031989 has 8 divisors (see below), whose sum is σ = 4435200. Its totient is φ = 3642096.

The previous prime is 4031987. The next prime is 4032029. The reversal of 4031989 is 9891304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4031989 - 2¹ = 4031987 is a prime.

It is a super-2 number, since 2×4031989² = 32513870592242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4031987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2689 + ... + 3910.

It is an arithmetic number, because the mean of its divisors is an integer number (554400).

Almost surely, 2^4031989 is an apocalyptic number.

It is an amenable number.

4031989 is a deficient number, since it is larger than the sum of its proper divisors (403211).

4031989 is a wasteful number, since it uses less digits than its factorization.

4031989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 4031989 is about 2007.9813246144. The cubic root of 4031989 is about 159.1621435749.

The spelling of 4031989 in words is "four million, thirty-one thousand, nine hundred eighty-nine".