28555834231 has 8 divisors (see below), whose sum is σ = 29611033200. Its totient is φ = 27505336320.

The previous prime is 28555834213. The next prime is 28555834247. The reversal of 28555834231 is 13243855582.

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 28555834231 - 2¹⁹ = 28555309943 is a prime.

It is a super-2 number, since 2×28555834231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555834261) 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, 1162890 + ... + 1187191.

It is an arithmetic number, because the mean of its divisors is an integer number (3701379150).

Almost surely, 2^28555834231 is an apocalyptic number.

28555834231 is a deficient number, since it is larger than the sum of its proper divisors (1055198969).

28555834231 is a wasteful number, since it uses less digits than its factorization.

28555834231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350529.

The product of its digits is 1152000, while the sum is 46.

The spelling of 28555834231 in words is "twenty-eight billion, five hundred fifty-five million, eight hundred thirty-four thousand, two hundred thirty-one".