2891985 has 8 divisors (see below), whose sum is σ = 4627200. Its totient is φ = 1542384.

The previous prime is 2891981. The next prime is 2892013. The reversal of 2891985 is 5891982.

It is a happy number.

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

It is not a de Polignac number, because 2891985 - 2² = 2891981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2891981) 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, 96385 + ... + 96414.

It is an arithmetic number, because the mean of its divisors is an integer number (578400).

2^2891985 is an apocalyptic number.

It is an amenable number.

2891985 is a deficient number, since it is larger than the sum of its proper divisors (1735215).

2891985 is a wasteful number, since it uses less digits than its factorization.

2891985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192807.

The product of its digits is 51840, while the sum is 42.

The square root of 2891985 is about 1700.5837233139. The cubic root of 2891985 is about 142.4728172219.

The spelling of 2891985 in words is "two million, eight hundred ninety-one thousand, nine hundred eighty-five".