2878722628 has 24 divisors (see below), whose sum is σ = 5055195992. Its totient is φ = 1434392064.

The previous prime is 2878722617. The next prime is 2878722629. The reversal of 2878722628 is 8262278782.

It can be written as a sum of positive squares in 4 ways, for example, as 2367600964 + 511121664 = 48658^2 + 22608^2 .

It is not an unprimeable number, because it can be changed into a prime (2878722629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218876 + ... + 2220172.

Almost surely, 2^2878722628 is an apocalyptic number.

It is an amenable number.

2878722628 is a deficient number, since it is larger than the sum of its proper divisors (2176473364).

2878722628 is a wasteful number, since it uses less digits than its factorization.

2878722628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791 (or 2789 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 52.

The square root of 2878722628 is about 53653.7289291248. The cubic root of 2878722628 is about 1422.5469445828.

It can be divided in two parts, 28787 and 22628, that added together give a palindrome (51415).

The spelling of 2878722628 in words is "two billion, eight hundred seventy-eight million, seven hundred twenty-two thousand, six hundred twenty-eight".