2778872158 has 8 divisors (see below), whose sum is σ = 4170176640. Its totient is φ = 1388813280.

The previous prime is 2778872149. The next prime is 2778872171. The reversal of 2778872158 is 8512788772.

2778872158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2778872099 and 2778872108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305803 + ... + 314758.

It is an arithmetic number, because the mean of its divisors is an integer number (521272080).

Almost surely, 2^2778872158 is an apocalyptic number.

2778872158 is a deficient number, since it is larger than the sum of its proper divisors (1391304482).

2778872158 is a wasteful number, since it uses less digits than its factorization.

2778872158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622802.

The product of its digits is 3512320, while the sum is 55.

The square root of 2778872158 is about 52715.0088494728. The cubic root of 2778872158 is about 1405.9056918034.

The spelling of 2778872158 in words is "two billion, seven hundred seventy-eight million, eight hundred seventy-two thousand, one hundred fifty-eight".