2821887 has 6 divisors (see below), whose sum is σ = 4076072. Its totient is φ = 1881252.

The previous prime is 2821877. The next prime is 2821909. The reversal of 2821887 is 7881282.

It is not a de Polignac number, because 2821887 - 2⁷ = 2821759 is a prime.

It is a super-3 number, since 3×2821887³ = 67412450001674733309, which contains 333 as substring.

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 (2821807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156763 + ... + 156780.

2^2821887 is an apocalyptic number.

2821887 is a deficient number, since it is larger than the sum of its proper divisors (1254185).

2821887 is a wasteful number, since it uses less digits than its factorization.

2821887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313549 (or 313546 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 2821887 is about 1679.8473144902. The cubic root of 2821887 is about 141.3122700356.

The spelling of 2821887 in words is "two million, eight hundred twenty-one thousand, eight hundred eighty-seven".