28528033331 has 8 divisors (see below), whose sum is σ = 33398673504. Its totient is φ = 23856194880.

The previous prime is 28528033283. The next prime is 28528033333. The reversal of 28528033331 is 13333082582.

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

It is not a de Polignac number, because 28528033331 - 2²² = 28523839027 is a prime.

It is a super-2 number, since 2×28528033331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28528033333) 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, 49700120 + ... + 49700693.

It is an arithmetic number, because the mean of its divisors is an integer number (4174834188).

Almost surely, 2^28528033331 is an apocalyptic number.

28528033331 is a deficient number, since it is larger than the sum of its proper divisors (4870640173).

28528033331 is an equidigital number, since it uses as much as digits as its factorization.

28528033331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99400861.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 28528033331 in words is "twenty-eight billion, five hundred twenty-eight million, thirty-three thousand, three hundred thirty-one".