2878213 has 4 divisors (see below), whose sum is σ = 3099628. Its totient is φ = 2656800.

The previous prime is 2878181. The next prime is 2878229. The reversal of 2878213 is 3128782.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1397124 + 1481089 = 1182^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 2878213 - 2⁵ = 2878181 is a prime.

It is a super-2 number, since 2×2878213² = 16568220146738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878313) 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, 110688 + ... + 110713.

It is an arithmetic number, because the mean of its divisors is an integer number (774907).

2^2878213 is an apocalyptic number.

It is an amenable number.

2878213 is a deficient number, since it is larger than the sum of its proper divisors (221415).

2878213 is a wasteful number, since it uses less digits than its factorization.

2878213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221414.

The product of its digits is 5376, while the sum is 31.

The square root of 2878213 is about 1696.5296932267. The cubic root of 2878213 is about 142.2462993860.

The spelling of 2878213 in words is "two million, eight hundred seventy-eight thousand, two hundred thirteen".