28000023 has 8 divisors (see below), whose sum is σ = 37753200. Its totient is φ = 18456768.

The previous prime is 28000019. The next prime is 28000031. The reversal of 28000023 is 32000082.

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

It is not a de Polignac number, because 28000023 - 2² = 28000019 is a prime.

It is a super-3 number, since 3×28000023³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27999966 and 28000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52168 + ... + 52701.

It is an arithmetic number, because the mean of its divisors is an integer number (4719150).

Almost surely, 2^28000023 is an apocalyptic number.

28000023 is a deficient number, since it is larger than the sum of its proper divisors (9753177).

28000023 is a wasteful number, since it uses less digits than its factorization.

28000023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104961.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 28000023 is about 5291.5047954245. The cubic root of 28000023 is about 303.6589803322.

The spelling of 28000023 in words is "twenty-eight million, twenty-three", and thus it is an aban number and an uban number.