28331382867 has 8 divisors (see below), whose sum is σ = 38653669824. Its totient is φ = 18448342248.

The previous prime is 28331382851. The next prime is 28331382883. The reversal of 28331382867 is 76828313382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28331382851) and next prime (28331382883).

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

It is not a de Polignac number, because 28331382867 - 2⁴ = 28331382851 is a prime.

It is a super-2 number, since 2×28331382867² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28331382067) 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, 109811433 + ... + 109811690.

It is an arithmetic number, because the mean of its divisors is an integer number (4831708728).

Almost surely, 2^28331382867 is an apocalyptic number.

28331382867 is a deficient number, since it is larger than the sum of its proper divisors (10322286957).

28331382867 is a wasteful number, since it uses less digits than its factorization.

28331382867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219623169.

The product of its digits is 2322432, while the sum is 51.

The spelling of 28331382867 in words is "twenty-eight billion, three hundred thirty-one million, three hundred eighty-two thousand, eight hundred sixty-seven".