28631823 has 8 divisors (see below), whose sum is σ = 41646336. Its totient is φ = 17352600.

The previous prime is 28631797. The next prime is 28631833. The reversal of 28631823 is 32813682.

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

It is not a de Polignac number, because 28631823 - 2¹⁰ = 28630799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 867631 = 28631823 / (2 + 8 + 6 + 3 + 1 + 8 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28631833) 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, 433783 + ... + 433848.

It is an arithmetic number, because the mean of its divisors is an integer number (5205792).

Almost surely, 2^28631823 is an apocalyptic number.

28631823 is a deficient number, since it is larger than the sum of its proper divisors (13014513).

28631823 is a wasteful number, since it uses less digits than its factorization.

28631823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867645.

The product of its digits is 13824, while the sum is 33.

The square root of 28631823 is about 5350.8712374715. The cubic root of 28631823 is about 305.9259614115.

The spelling of 28631823 in words is "twenty-eight million, six hundred thirty-one thousand, eight hundred twenty-three".