28267720230 has 32 divisors (see below), whose sum is σ = 67851237600. Its totient is φ = 7537091072.

The previous prime is 28267720181. The next prime is 28267720237. The reversal of 28267720230 is 3202776282.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28267720237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194776 + ... + 307364.

It is an arithmetic number, because the mean of its divisors is an integer number (2120351175).

Almost surely, 2^28267720230 is an apocalyptic number.

28267720230 is an abundant number, since it is smaller than the sum of its proper divisors (39583517370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28267720230 is a wasteful number, since it uses less digits than its factorization.

28267720230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120968.

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 28267720230 in words is "twenty-eight billion, two hundred sixty-seven million, seven hundred twenty thousand, two hundred thirty".