2787787042 has 4 divisors (see below), whose sum is σ = 4181680566. Its totient is φ = 1393893520.

The previous prime is 2787786977. The next prime is 2787787043. The reversal of 2787787042 is 2407877872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2757195081 + 30591961 = 52509^2 + 5531^2 .

It is not an unprimeable number, because it can be changed into a prime (2787787043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696946759 + ... + 696946762.

Almost surely, 2^2787787042 is an apocalyptic number.

2787787042 is a deficient number, since it is larger than the sum of its proper divisors (1393893524).

2787787042 is a wasteful number, since it uses less digits than its factorization.

2787787042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393893523.

The product of its (nonzero) digits is 2458624, while the sum is 52.

The square root of 2787787042 is about 52799.4985014062. The cubic root of 2787787042 is about 1407.4075129757.

The spelling of 2787787042 in words is "two billion, seven hundred eighty-seven million, seven hundred eighty-seven thousand, forty-two".