2828289778 has 4 divisors (see below), whose sum is σ = 4242434670. Its totient is φ = 1414144888.

The previous prime is 2828289767. The next prime is 2828289781. The reversal of 2828289778 is 8779828282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8779828282 = 2 ⋅4389914141.

It can be written as a sum of positive squares in only one way, i.e., 1880696689 + 947593089 = 43367^2 + 30783^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 707072443 + ... + 707072446.

Almost surely, 2^2828289778 is an apocalyptic number.

2828289778 is a deficient number, since it is larger than the sum of its proper divisors (1414144892).

2828289778 is a wasteful number, since it uses less digits than its factorization.

2828289778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414144891.

The product of its digits is 14450688, while the sum is 61.

The square root of 2828289778 is about 53181.6676872774. The cubic root of 2828289778 is about 1414.1906708782.

The spelling of 2828289778 in words is "two billion, eight hundred twenty-eight million, two hundred eighty-nine thousand, seven hundred seventy-eight".