2785296978 has 12 divisors (see below), whose sum is σ = 6034810158. Its totient is φ = 928432320.

The previous prime is 2785296977. The next prime is 2785297043. The reversal of 2785296978 is 8796925872.

2785296978 is a `hidden beast` number, since 278 + 5 + 296 + 9 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1415038689 + 1370258289 = 37617^2 + 37017^2 .

It is not an unprimeable number, because it can be changed into a prime (2785296973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77369343 + ... + 77369378.

Almost surely, 2^2785296978 is an apocalyptic number.

2785296978 is an abundant number, since it is smaller than the sum of its proper divisors (3249513180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2785296978 is a wasteful number, since it uses less digits than its factorization.

2785296978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154738729 (or 154738726 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The square root of 2785296978 is about 52775.9128580454. The cubic root of 2785296978 is about 1406.9883538997.

The spelling of 2785296978 in words is "two billion, seven hundred eighty-five million, two hundred ninety-six thousand, nine hundred seventy-eight".