2805252778 has 4 divisors (see below), whose sum is σ = 4207879170. Its totient is φ = 1402626388.

The previous prime is 2805252761. The next prime is 2805252803. The reversal of 2805252778 is 8772525082.

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., 2161971009 + 643281769 = 46497^2 + 25363^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701313193 + ... + 701313196.

Almost surely, 2^2805252778 is an apocalyptic number.

2805252778 is a deficient number, since it is larger than the sum of its proper divisors (1402626392).

2805252778 is a wasteful number, since it uses less digits than its factorization.

2805252778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402626391.

The product of its (nonzero) digits is 627200, while the sum is 46.

The square root of 2805252778 is about 52964.6370515271. The cubic root of 2805252778 is about 1410.3405743036.

The spelling of 2805252778 in words is "two billion, eight hundred five million, two hundred fifty-two thousand, seven hundred seventy-eight".