28601823021 has 8 divisors (see below), whose sum is σ = 38137138944. Its totient is φ = 19067194560.

The previous prime is 28601823017. The next prime is 28601823073. The reversal of 28601823021 is 12032810682.

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

It is not a de Polignac number, because 28601823021 - 2² = 28601823017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28601823001) 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, 65356 + ... + 247941.

It is an arithmetic number, because the mean of its divisors is an integer number (4767142368).

Almost surely, 2^28601823021 is an apocalyptic number.

It is an amenable number.

28601823021 is a deficient number, since it is larger than the sum of its proper divisors (9535315923).

28601823021 is a wasteful number, since it uses less digits than its factorization.

28601823021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343731.

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 28601823021 in words is "twenty-eight billion, six hundred one million, eight hundred twenty-three thousand, twenty-one".