5681078728 has 32 divisors (see below), whose sum is σ = 11507663160. Its totient is φ = 2613749760.

The previous prime is 5681078701. The next prime is 5681078737. The reversal of 5681078728 is 8278701865.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3102267204 + 2578811524 = 55698^2 + 50782^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53193 + ... + 119128.

Almost surely, 2^5681078728 is an apocalyptic number.

It is an amenable number.

5681078728 is an abundant number, since it is smaller than the sum of its proper divisors (5826584432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5681078728 is a wasteful number, since it uses less digits than its factorization.

5681078728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172657 (or 172653 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 52.

The square root of 5681078728 is about 75372.9310031128. The cubic root of 5681078728 is about 1784.3372251905.

The spelling of 5681078728 in words is "five billion, six hundred eighty-one million, seventy-eight thousand, seven hundred twenty-eight".