28736188971 has 8 divisors (see below), whose sum is σ = 43788478464. Its totient is φ = 16420679400.

The previous prime is 28736188931. The next prime is 28736188973. The reversal of 28736188971 is 17988163782.

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

It is not a de Polignac number, because 28736188971 - 2¹³ = 28736180779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28736188973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684194955 + ... + 684194996.

It is an arithmetic number, because the mean of its divisors is an integer number (5473559808).

Almost surely, 2^28736188971 is an apocalyptic number.

28736188971 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28736188971 is a deficient number, since it is larger than the sum of its proper divisors (15052289493).

28736188971 is a wasteful number, since it uses less digits than its factorization.

28736188971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368389961.

The product of its digits is 8128512, while the sum is 60.

The spelling of 28736188971 in words is "twenty-eight billion, seven hundred thirty-six million, one hundred eighty-eight thousand, nine hundred seventy-one".