28287561453 has 4 divisors (see below), whose sum is σ = 37716748608. Its totient is φ = 18858374300.

The previous prime is 28287561433. The next prime is 28287561461. The reversal of 28287561453 is 35416578282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28287561453 - 2¹⁰ = 28287560429 is a prime.

It is a super-2 number, since 2×28287561453² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28287561396 and 28287561405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287561413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4714593573 + ... + 4714593578.

It is an arithmetic number, because the mean of its divisors is an integer number (9429187152).

Almost surely, 2^28287561453 is an apocalyptic number.

It is an amenable number.

28287561453 is a deficient number, since it is larger than the sum of its proper divisors (9429187155).

28287561453 is an equidigital number, since it uses as much as digits as its factorization.

28287561453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9429187154.

The product of its digits is 3225600, while the sum is 51.

The spelling of 28287561453 in words is "twenty-eight billion, two hundred eighty-seven million, five hundred sixty-one thousand, four hundred fifty-three".