2787075728 has 20 divisors (see below), whose sum is σ = 5401573548. Its totient is φ = 1393121280.

The previous prime is 2787075721. The next prime is 2787075749. The reversal of 2787075728 is 8275707872.

It can be written as a sum of positive squares in 2 ways, for example, as 2082279424 + 704796304 = 45632^2 + 26548^2 .

It is a super-2 number, since 2×2787075728² = 15535582227213459968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2787075728.

It is not an unprimeable number, because it can be changed into a prime (2787075721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33248 + ... + 81728.

Almost surely, 2^2787075728 is an apocalyptic number.

It is an amenable number.

2787075728 is a deficient number, since it is larger than the sum of its proper divisors (2614497820).

2787075728 is a wasteful number, since it uses less digits than its factorization.

2787075728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52082 (or 52076 counting only the distinct ones).

The product of its (nonzero) digits is 3073280, while the sum is 53.

The square root of 2787075728 is about 52792.7620796639. The cubic root of 2787075728 is about 1407.2878010787.

The spelling of 2787075728 in words is "two billion, seven hundred eighty-seven million, seventy-five thousand, seven hundred twenty-eight".