28294534487 has 4 divisors (see below), whose sum is σ = 29270208120. Its totient is φ = 27318860856.

The previous prime is 28294534481. The next prime is 28294534507. The reversal of 28294534487 is 78443549282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28294534487 - 2⁶ = 28294534423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28294534481) 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, 487836773 + ... + 487836830.

It is an arithmetic number, because the mean of its divisors is an integer number (7317552030).

Almost surely, 2^28294534487 is an apocalyptic number.

28294534487 is a deficient number, since it is larger than the sum of its proper divisors (975673633).

28294534487 is an equidigital number, since it uses as much as digits as its factorization.

28294534487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975673632.

The product of its digits is 15482880, while the sum is 56.

The spelling of 28294534487 in words is "twenty-eight billion, two hundred ninety-four million, five hundred thirty-four thousand, four hundred eighty-seven".