28245453787 has 16 divisors (see below), whose sum is σ = 29255385600. Its totient is φ = 27252505600.

The previous prime is 28245453767. The next prime is 28245453809. The reversal of 28245453787 is 78735454282.

It is a cyclic number.

It is not a de Polignac number, because 28245453787 - 2²³ = 28237065179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28245453767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1344339 + ... + 1365187.

It is an arithmetic number, because the mean of its divisors is an integer number (1828461600).

Almost surely, 2^28245453787 is an apocalyptic number.

28245453787 is a deficient number, since it is larger than the sum of its proper divisors (1009931813).

28245453787 is a wasteful number, since it uses less digits than its factorization.

28245453787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21254.

The product of its digits is 15052800, while the sum is 55.

The spelling of 28245453787 in words is "twenty-eight billion, two hundred forty-five million, four hundred fifty-three thousand, seven hundred eighty-seven".