2978879 has 4 divisors (see below), whose sum is σ = 2982480. Its totient is φ = 2975280.

The previous prime is 2978869. The next prime is 2978917. The reversal of 2978879 is 9788792.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2978879 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 (2978819) 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, 134 + ... + 2444.

It is an arithmetic number, because the mean of its divisors is an integer number (745620).

2^2978879 is an apocalyptic number.

2978879 is a deficient number, since it is larger than the sum of its proper divisors (3601).

2978879 is a wasteful number, since it uses less digits than its factorization.

2978879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600.

The product of its digits is 508032, while the sum is 50.

The square root of 2978879 is about 1725.9429306904. The cubic root of 2978879 is about 143.8856956856.

The spelling of 2978879 in words is "two million, nine hundred seventy-eight thousand, eight hundred seventy-nine".