28538367971 has 8 divisors (see below), whose sum is σ = 28576422864. Its totient is φ = 28500339040.

The previous prime is 28538367967. The next prime is 28538368021. The reversal of 28538367971 is 17976383582.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28538367971 - 2² = 28538367967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28538367971.

It is not an unprimeable number, because it can be changed into a prime (28538367911) 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, 3106541 + ... + 3115713.

It is an arithmetic number, because the mean of its divisors is an integer number (3572052858).

Almost surely, 2^28538367971 is an apocalyptic number.

28538367971 is a deficient number, since it is larger than the sum of its proper divisors (38054893).

28538367971 is a wasteful number, since it uses less digits than its factorization.

28538367971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12981.

The product of its digits is 15240960, while the sum is 59.

The spelling of 28538367971 in words is "twenty-eight billion, five hundred thirty-eight million, three hundred sixty-seven thousand, nine hundred seventy-one".