2774385728 has 14 divisors (see below), whose sum is σ = 5505421806. Its totient is φ = 1387192832.

The previous prime is 2774385721. The next prime is 2774385749. The reversal of 2774385728 is 8275834772.

It can be written as a sum of positive squares in only one way, i.e., 1662029824 + 1112355904 = 40768^2 + 33352^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2774385728.

It is not an unprimeable number, because it can be changed into a prime (2774385721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21674825 + ... + 21674952.

Almost surely, 2^2774385728 is an apocalyptic number.

It is an amenable number.

2774385728 is a deficient number, since it is larger than the sum of its proper divisors (2731036078).

2774385728 is an equidigital number, since it uses as much as digits as its factorization.

2774385728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43349789 (or 43349779 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 53.

The square root of 2774385728 is about 52672.4380297704. The cubic root of 2774385728 is about 1405.1486826522.

The spelling of 2774385728 in words is "two billion, seven hundred seventy-four million, three hundred eighty-five thousand, seven hundred twenty-eight".