2878864 has 20 divisors (see below), whose sum is σ = 5821056.
Its totient is φ = 1376672.
The previous prime is 2878853. The next prime is 2878867. The reversal of 2878864 is 4688782.
It is a self number, because there is not a number n which added to its sum of digits gives 2878864.
It is not an unprimeable number, because it can be changed into a prime (2878867) 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, 3544 + ... + 4279.
22878864 is an apocalyptic number.
It is an amenable number.
2878864 is an abundant number, since it is smaller than the sum of its proper divisors (2942192).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2878864 is a wasteful number, since it uses less digits than its factorization.
2878864 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7854 (or 7848 counting only the distinct ones).
The product of its digits is 172032, while the sum is 43.
The square root of 2878864 is about 1696.7215446266.
The cubic root of 2878864 is about 142.2570230954.
The spelling of 2878864 in words is "two million, eight hundred seventy-eight thousand, eight hundred sixty-four".