2787489 has 24 divisors (see below), whose sum is σ = 4239872. Its totient is φ = 1762560.

The previous prime is 2787481. The next prime is 2787497. The reversal of 2787489 is 9847872.

It is an interprime number because it is at equal distance from previous prime (2787481) and next prime (2787497).

It is not a de Polignac number, because 2787489 - 2³ = 2787481 is a prime.

It is a d-powerful number, because it can be written as 2 + 7⁷ + 8 + 7⁷ + 4¹⁰ + 8⁵ + 9⁵ .

It is a Duffinian number.

It is a Curzon number.

2787489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2787481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27012 + ... + 27114.

2^2787489 is an apocalyptic number.

It is an amenable number.

2787489 is a deficient number, since it is larger than the sum of its proper divisors (1452383).

2787489 is a wasteful number, since it uses less digits than its factorization.

2787489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 234 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 2787489 is about 1669.5774914630. The cubic root of 2787489 is about 140.7357355928.

The spelling of 2787489 in words is "two million, seven hundred eighty-seven thousand, four hundred eighty-nine".