28985723 has 8 divisors (see below), whose sum is σ = 31279248. Its totient is φ = 26701344.

The previous prime is 28985717. The next prime is 28985767. The reversal of 28985723 is 32758982.

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 28985723 - 2¹² = 28981627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28985783) 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, 5240 + ... + 9242.

It is an arithmetic number, because the mean of its divisors is an integer number (3909906).

Almost surely, 2^28985723 is an apocalyptic number.

28985723 is a deficient number, since it is larger than the sum of its proper divisors (2293525).

28985723 is a wasteful number, since it uses less digits than its factorization.

28985723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4573.

The product of its digits is 241920, while the sum is 44.

The square root of 28985723 is about 5383.8390577728. The cubic root of 28985723 is about 307.1812565141.

The spelling of 28985723 in words is "twenty-eight million, nine hundred eighty-five thousand, seven hundred twenty-three".