28719823 has 8 divisors (see below), whose sum is σ = 31381200. Its totient is φ = 26066880.

The previous prime is 28719797. The next prime is 28719827. The reversal of 28719823 is 32891782.

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 28719823 - 2²¹ = 26622671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28719827) 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, 6603 + ... + 10051.

It is an arithmetic number, because the mean of its divisors is an integer number (3922650).

Almost surely, 2^28719823 is an apocalyptic number.

28719823 is a deficient number, since it is larger than the sum of its proper divisors (2661377).

28719823 is a wasteful number, since it uses less digits than its factorization.

28719823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217.

The product of its digits is 48384, while the sum is 40.

The square root of 28719823 is about 5359.0878888109. The cubic root of 28719823 is about 306.2390623332.

The spelling of 28719823 in words is "twenty-eight million, seven hundred nineteen thousand, eight hundred twenty-three".