2861885 has 8 divisors (see below), whose sum is σ = 3698520. Its totient is φ = 2113344.

The previous prime is 2861869. The next prime is 2861897. The reversal of 2861885 is 5881682.

It can be written as a sum of positive squares in 4 ways, for example, as 32761 + 2829124 = 181^2 + 1682^2 .

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 2861885 - 2⁴ = 2861869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21950 + ... + 22079.

It is an arithmetic number, because the mean of its divisors is an integer number (462315).

2^2861885 is an apocalyptic number.

It is an amenable number.

2861885 is a deficient number, since it is larger than the sum of its proper divisors (836635).

2861885 is a wasteful number, since it uses less digits than its factorization.

2861885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44047.

The product of its digits is 30720, while the sum is 38.

The square root of 2861885 is about 1691.7106726624. The cubic root of 2861885 is about 141.9768030613.

The spelling of 2861885 in words is "two million, eight hundred sixty-one thousand, eight hundred eighty-five".