28078750053 has 12 divisors (see below), whose sum is σ = 40623937068. Its totient is φ = 18688824000.

The previous prime is 28078750013. The next prime is 28078750057. The reversal of 28078750053 is 35005787082.

28078750053 is a `hidden beast` number, since 28 + 0 + 78 + 7 + 500 + 53 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10564345089 + 17514404964 = 102783^2 + 132342^2 .

It is not a de Polignac number, because 28078750053 - 2¹⁰ = 28078749029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28078749990 and 28078750008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078750057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2522698 + ... + 2533803.

It is an arithmetic number, because the mean of its divisors is an integer number (3385328089).

Almost surely, 2^28078750053 is an apocalyptic number.

It is an amenable number.

28078750053 is a deficient number, since it is larger than the sum of its proper divisors (12545187015).

28078750053 is a wasteful number, since it uses less digits than its factorization.

28078750053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5057124 (or 5057121 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 28078750053 in words is "twenty-eight billion, seventy-eight million, seven hundred fifty thousand, fifty-three".