28831075778 has 16 divisors (see below), whose sum is σ = 45793786104. Its totient is φ = 13566600960.

The previous prime is 28831075769. The next prime is 28831075781. The reversal of 28831075778 is 87757013882.

It can be written as a sum of positive squares in 4 ways, for example, as 25069338889 + 3761736889 = 158333^2 + 61333^2 .

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, 742568 + ... + 780428.

Almost surely, 2^28831075778 is an apocalyptic number.

28831075778 is a deficient number, since it is larger than the sum of its proper divisors (16962710326).

28831075778 is a wasteful number, since it uses less digits than its factorization.

28831075778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60277.

The product of its (nonzero) digits is 5268480, while the sum is 56.

The spelling of 28831075778 in words is "twenty-eight billion, eight hundred thirty-one million, seventy-five thousand, seven hundred seventy-eight".