2857788242 has 4 divisors (see below), whose sum is σ = 4286682366. Its totient is φ = 1428894120.

The previous prime is 2857788239. The next prime is 2857788253. The reversal of 2857788242 is 2428877582.

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., 1694227921 + 1163560321 = 41161^2 + 34111^2 .

It is a super-2 number, since 2×2857788242² = 16333907272226901128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714447059 + ... + 714447062.

Almost surely, 2^2857788242 is an apocalyptic number.

2857788242 is a deficient number, since it is larger than the sum of its proper divisors (1428894124).

2857788242 is a wasteful number, since it uses less digits than its factorization.

2857788242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428894123.

The product of its digits is 4014080, while the sum is 53.

The square root of 2857788242 is about 53458.2850641507. The cubic root of 2857788242 is about 1419.0902461408.

The spelling of 2857788242 in words is "two billion, eight hundred fifty-seven million, seven hundred eighty-eight thousand, two hundred forty-two".