2878646 has 4 divisors (see below), whose sum is σ = 4317972. Its totient is φ = 1439322.

The previous prime is 2878639. The next prime is 2878679. The reversal of 2878646 is 6468782.

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

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719660 + ... + 719663.

It is an arithmetic number, because the mean of its divisors is an integer number (1079493).

2^2878646 is an apocalyptic number.

2878646 is a deficient number, since it is larger than the sum of its proper divisors (1439326).

2878646 is a wasteful number, since it uses less digits than its factorization.

2878646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439325.

The product of its digits is 129024, while the sum is 41.

The square root of 2878646 is about 1696.6573018733. The cubic root of 2878646 is about 142.2534322330.

The spelling of 2878646 in words is "two million, eight hundred seventy-eight thousand, six hundred forty-six".