28547488387 has 4 divisors (see below), whose sum is σ = 31142714616. Its totient is φ = 25952262160.

The previous prime is 28547488363. The next prime is 28547488457. The reversal of 28547488387 is 78388474582.

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

It is not a de Polignac number, because 28547488387 - 2²⁷ = 28413270659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28547488687) 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, 1297613098 + ... + 1297613119.

It is an arithmetic number, because the mean of its divisors is an integer number (7785678654).

Almost surely, 2^28547488387 is an apocalyptic number.

28547488387 is a deficient number, since it is larger than the sum of its proper divisors (2595226229).

28547488387 is a wasteful number, since it uses less digits than its factorization.

28547488387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595226228.

The product of its digits is 96337920, while the sum is 64.

The spelling of 28547488387 in words is "twenty-eight billion, five hundred forty-seven million, four hundred eighty-eight thousand, three hundred eighty-seven".