28057728453 has 8 divisors (see below), whose sum is σ = 37411091616. Its totient is φ = 18704758800.

The previous prime is 28057728449. The next prime is 28057728467. The reversal of 28057728453 is 35482775082.

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

It is not a de Polignac number, because 28057728453 - 2² = 28057728449 is a prime.

It is a super-2 number, since 2×28057728453² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28057728396 and 28057728405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057728253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182818 + ... + 299228.

It is an arithmetic number, because the mean of its divisors is an integer number (4676386452).

Almost surely, 2^28057728453 is an apocalyptic number.

It is an amenable number.

28057728453 is a deficient number, since it is larger than the sum of its proper divisors (9353363163).

28057728453 is a wasteful number, since it uses less digits than its factorization.

28057728453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196755.

The product of its (nonzero) digits is 3763200, while the sum is 51.

The spelling of 28057728453 in words is "twenty-eight billion, fifty-seven million, seven hundred twenty-eight thousand, four hundred fifty-three".