28723833420858 has 96 divisors (see below), whose sum is σ = 67349019943296. Its totient is φ = 9157920792768.

The previous prime is 28723833420847. The next prime is 28723833420899. The reversal of 28723833420858 is 85802433832782.

28723833420858 is a `hidden beast` number, since 2 + 8 + 7 + 238 + 3 + 342 + 0 + 8 + 58 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28723833420795 and 28723833420804.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 352256260 + ... + 352337792.

It is an arithmetic number, because the mean of its divisors is an integer number (701552291076).

Almost surely, 2^{28723833420858} is an apocalyptic number.

28723833420858 is an abundant number, since it is smaller than the sum of its proper divisors (38625186522438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28723833420858 is a wasteful number, since it uses less digits than its factorization.

28723833420858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113090 (or 113078 counting only the distinct ones).

The product of its (nonzero) digits is 123863040, while the sum is 63.

The spelling of 28723833420858 in words is "twenty-eight trillion, seven hundred twenty-three billion, eight hundred thirty-three million, four hundred twenty thousand, eight hundred fifty-eight".