2978087 has 4 divisors (see below), whose sum is σ = 3403536. Its totient is φ = 2552640.

The previous prime is 2978071. The next prime is 2978089. The reversal of 2978087 is 7808792.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2978087 - 2⁴ = 2978071 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 (2978089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212714 + ... + 212727.

It is an arithmetic number, because the mean of its divisors is an integer number (850884).

2^2978087 is an apocalyptic number.

2978087 is a deficient number, since it is larger than the sum of its proper divisors (425449).

2978087 is an equidigital number, since it uses as much as digits as its factorization.

2978087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425448.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 2978087 is about 1725.7134756384. The cubic root of 2978087 is about 143.8729428377.

The spelling of 2978087 in words is "two million, nine hundred seventy-eight thousand, eighty-seven".