28325788381 has 8 divisors (see below), whose sum is σ = 30915863424. Its totient is φ = 25738213920.

The previous prime is 28325788369. The next prime is 28325788417. The reversal of 28325788381 is 18388752382.

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 28325788381 - 2⁵ = 28325788349 is a prime.

It is a super-2 number, since 2×28325788381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28325788301) 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, 601416 + ... + 646801.

It is an arithmetic number, because the mean of its divisors is an integer number (3864482928).

Almost surely, 2^28325788381 is an apocalyptic number.

It is an amenable number.

28325788381 is a deficient number, since it is larger than the sum of its proper divisors (2590075043).

28325788381 is a wasteful number, since it uses less digits than its factorization.

28325788381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250291.

The product of its digits is 5160960, while the sum is 55.

The spelling of 28325788381 in words is "twenty-eight billion, three hundred twenty-five million, seven hundred eighty-eight thousand, three hundred eighty-one".