2865989 has 8 divisors (see below), whose sum is σ = 3287040. Its totient is φ = 2447856.

The previous prime is 2865977. The next prime is 2866001. The reversal of 2865989 is 9895682.

It is an interprime number because it is at equal distance from previous prime (2865977) and next prime (2866001).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2865989 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2147 + ... + 3215.

It is an arithmetic number, because the mean of its divisors is an integer number (410880).

2^2865989 is an apocalyptic number.

It is an amenable number.

2865989 is a deficient number, since it is larger than the sum of its proper divisors (421051).

2865989 is a wasteful number, since it uses less digits than its factorization.

2865989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459.

The product of its digits is 311040, while the sum is 47.

The square root of 2865989 is about 1692.9232114895. The cubic root of 2865989 is about 142.0446364997.

The spelling of 2865989 in words is "two million, eight hundred sixty-five thousand, nine hundred eighty-nine".