28601432889 has 8 divisors (see below), whose sum is σ = 38760412032. Its totient is φ = 18755037840.

The previous prime is 28601432879. The next prime is 28601432897. The reversal of 28601432889 is 98823410682.

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

It is not a de Polignac number, because 28601432889 - 2¹¹ = 28601430841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28601432879) 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, 78145809 + ... + 78146174.

It is an arithmetic number, because the mean of its divisors is an integer number (4845051504).

Almost surely, 2^28601432889 is an apocalyptic number.

It is an amenable number.

28601432889 is a deficient number, since it is larger than the sum of its proper divisors (10158979143).

28601432889 is a wasteful number, since it uses less digits than its factorization.

28601432889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156292047.

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 28601432889 in words is "twenty-eight billion, six hundred one million, four hundred thirty-two thousand, eight hundred eighty-nine".