28771553427 has 8 divisors (see below), whose sum is σ = 38638057920. Its totient is φ = 19043042280.

The previous prime is 28771553407. The next prime is 28771553483. The reversal of 28771553427 is 72435517782.

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

It is not a de Polignac number, because 28771553427 - 2¹⁹ = 28771029139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28771553427.

It is not an unprimeable number, because it can be changed into a prime (28771553407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34497849 + ... + 34498682.

It is an arithmetic number, because the mean of its divisors is an integer number (4829757240).

Almost surely, 2^28771553427 is an apocalyptic number.

28771553427 is a deficient number, since it is larger than the sum of its proper divisors (9866504493).

28771553427 is a wasteful number, since it uses less digits than its factorization.

28771553427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68996673.

The product of its digits is 3292800, while the sum is 51.

The spelling of 28771553427 in words is "twenty-eight billion, seven hundred seventy-one million, five hundred fifty-three thousand, four hundred twenty-seven".