2785467778 has 8 divisors (see below), whose sum is σ = 4178672640. Its totient is φ = 1392576900.

The previous prime is 2785467761. The next prime is 2785467779. The reversal of 2785467778 is 8777645872.

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

It is not an unprimeable number, because it can be changed into a prime (2785467779) 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, 54898 + ... + 92653.

It is an arithmetic number, because the mean of its divisors is an integer number (522334080).

Almost surely, 2^2785467778 is an apocalyptic number.

2785467778 is a deficient number, since it is larger than the sum of its proper divisors (1393204862).

2785467778 is a wasteful number, since it uses less digits than its factorization.

2785467778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156992.

The product of its digits is 36879360, while the sum is 61.

The square root of 2785467778 is about 52777.5309956803. The cubic root of 2785467778 is about 1407.0171130949.

The spelling of 2785467778 in words is "two billion, seven hundred eighty-five million, four hundred sixty-seven thousand, seven hundred seventy-eight".