28321388157 has 8 divisors (see below), whose sum is σ = 38037485376. Its totient is φ = 18743108192.

The previous prime is 28321388143. The next prime is 28321388191. The reversal of 28321388157 is 75188312382.

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 28321388157 - 2⁸ = 28321387901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321388107) 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, 34453833 + ... + 34454654.

It is an arithmetic number, because the mean of its divisors is an integer number (4754685672).

Almost surely, 2^28321388157 is an apocalyptic number.

It is an amenable number.

28321388157 is a deficient number, since it is larger than the sum of its proper divisors (9716097219).

28321388157 is a wasteful number, since it uses less digits than its factorization.

28321388157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68908627.

The product of its digits is 645120, while the sum is 48.

The spelling of 28321388157 in words is "twenty-eight billion, three hundred twenty-one million, three hundred eighty-eight thousand, one hundred fifty-seven".