2978287 has 6 divisors (see below), whose sum is σ = 3225192. Its totient is φ = 2749032.

The previous prime is 2978273. The next prime is 2978299. The reversal of 2978287 is 7828792.

It is not a de Polignac number, because 2978287 - 2¹⁵ = 2945519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978267) 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, 8643 + ... + 8980.

It is an arithmetic number, because the mean of its divisors is an integer number (537532).

2^2978287 is an apocalyptic number.

2978287 is a deficient number, since it is larger than the sum of its proper divisors (246905).

2978287 is a wasteful number, since it uses less digits than its factorization.

2978287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17649 (or 17636 counting only the distinct ones).

The product of its digits is 112896, while the sum is 43.

The square root of 2978287 is about 1725.7714217126. The cubic root of 2978287 is about 143.8761634672.

The spelling of 2978287 in words is "two million, nine hundred seventy-eight thousand, two hundred eighty-seven".