28605633423 has 16 divisors (see below), whose sum is σ = 40389199200. Its totient is φ = 17946510336.

The previous prime is 28605633401. The next prime is 28605633443. The reversal of 28605633423 is 32433650682.

It is a Cunningham number, because it is equal to 169132²-1.

It is not a de Polignac number, because 28605633423 - 2¹⁰ = 28605632399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28605633443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479211 + ... + 535587.

It is an arithmetic number, because the mean of its divisors is an integer number (2524324950).

Almost surely, 2^28605633423 is an apocalyptic number.

28605633423 is a deficient number, since it is larger than the sum of its proper divisors (11783565777).

28605633423 is a wasteful number, since it uses less digits than its factorization.

28605633423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66346.

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 28605633423 in words is "twenty-eight billion, six hundred five million, six hundred thirty-three thousand, four hundred twenty-three".