28113584057 has 8 divisors (see below), whose sum is σ = 31320173640. Its totient is φ = 25056138240.

The previous prime is 28113584053. The next prime is 28113584071. The reversal of 28113584057 is 75048531182.

It can be written as a sum of positive squares in 4 ways, for example, as 6618798736 + 21494785321 = 81356^2 + 146611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28113584057 - 2² = 28113584053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28113583999 and 28113584017.

It is not an unprimeable number, because it can be changed into a prime (28113584053) 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, 37285544 + ... + 37286297.

It is an arithmetic number, because the mean of its divisors is an integer number (3915021705).

Almost surely, 2^28113584057 is an apocalyptic number.

It is an amenable number.

28113584057 is a deficient number, since it is larger than the sum of its proper divisors (3206589583).

28113584057 is a wasteful number, since it uses less digits than its factorization.

28113584057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74571883.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 28113584057 in words is "twenty-eight billion, one hundred thirteen million, five hundred eighty-four thousand, fifty-seven".