28100123 has 8 divisors (see below), whose sum is σ = 28755648. Its totient is φ = 27449344.

The previous prime is 28100041. The next prime is 28100141. The reversal of 28100123 is 32100182.

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

It is a cyclic number.

It is not a de Polignac number, because 28100123 - 2¹⁴ = 28083739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28100153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12590 + ... + 14652.

It is an arithmetic number, because the mean of its divisors is an integer number (3594456).

Almost surely, 2^28100123 is an apocalyptic number.

28100123 is a deficient number, since it is larger than the sum of its proper divisors (655525).

28100123 is a wasteful number, since it uses less digits than its factorization.

28100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 28100123 is about 5300.9549139754. The cubic root of 28100123 is about 304.0204099582.

The spelling of 28100123 in words is "twenty-eight million, one hundred thousand, one hundred twenty-three".