2447878 has 4 divisors (see below), whose sum is σ = 3671820. Its totient is φ = 1223938.

The previous prime is 2447843. The next prime is 2447897. The reversal of 2447878 is 8787442.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2447878.

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, 611968 + ... + 611971.

It is an arithmetic number, because the mean of its divisors is an integer number (917955).

2^2447878 is an apocalyptic number.

2447878 is a deficient number, since it is larger than the sum of its proper divisors (1223942).

2447878 is a wasteful number, since it uses less digits than its factorization.

2447878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223941.

The product of its digits is 100352, while the sum is 40.

The square root of 2447878 is about 1564.5695893759. The cubic root of 2447878 is about 134.7710430981.

The spelling of 2447878 in words is "two million, four hundred forty-seven thousand, eight hundred seventy-eight".