2878744809 has 4 divisors (see below), whose sum is σ = 3838326416. Its totient is φ = 1919163204.

The previous prime is 2878744801. The next prime is 2878744811. The reversal of 2878744809 is 9084478782.

2878744809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2878744809 - 2³ = 2878744801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2878744801) 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, 479790799 + ... + 479790804.

It is an arithmetic number, because the mean of its divisors is an integer number (959581604).

Almost surely, 2^2878744809 is an apocalyptic number.

It is an amenable number.

2878744809 is a deficient number, since it is larger than the sum of its proper divisors (959581607).

2878744809 is an equidigital number, since it uses as much as digits as its factorization.

2878744809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959581606.

The product of its (nonzero) digits is 7225344, while the sum is 57.

The square root of 2878744809 is about 53653.9356338377. The cubic root of 2878744809 is about 1422.5505982210.

The spelling of 2878744809 in words is "two billion, eight hundred seventy-eight million, seven hundred forty-four thousand, eight hundred nine".