4045989 has 8 divisors (see below), whose sum is σ = 5410080. Its totient is φ = 2689616.

The previous prime is 4045973. The next prime is 4045997. The reversal of 4045989 is 9895404.

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 4045989 - 2⁴ = 4045973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4045969) 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, 567 + ... + 2900.

It is an arithmetic number, because the mean of its divisors is an integer number (676260).

Almost surely, 2^4045989 is an apocalyptic number.

It is an amenable number.

4045989 is a deficient number, since it is larger than the sum of its proper divisors (1364091).

4045989 is a wasteful number, since it uses less digits than its factorization.

4045989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 4045989 is about 2011.4643919294. The cubic root of 4045989 is about 159.3461467183.

The spelling of 4045989 in words is "four million, forty-five thousand, nine hundred eighty-nine".