2878143949 has 4 divisors (see below), whose sum is σ = 2878470720. Its totient is φ = 2877817180.

The previous prime is 2878143941. The next prime is 2878143967. The reversal of 2878143949 is 9493418782.

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 a cyclic number.

It is not a de Polignac number, because 2878143949 - 2³ = 2878143941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2878143949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878143941) 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, 149797 + ... + 167914.

It is an arithmetic number, because the mean of its divisors is an integer number (719617680).

Almost surely, 2^2878143949 is an apocalyptic number.

It is an amenable number.

2878143949 is a deficient number, since it is larger than the sum of its proper divisors (326771).

2878143949 is an equidigital number, since it uses as much as digits as its factorization.

2878143949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326770.

The product of its digits is 3483648, while the sum is 55.

The square root of 2878143949 is about 53648.3359387782. The cubic root of 2878143949 is about 1422.4516183664.

The spelling of 2878143949 in words is "two billion, eight hundred seventy-eight million, one hundred forty-three thousand, nine hundred forty-nine".