28238770143 has 12 divisors (see below), whose sum is σ = 40792992240. Its totient is φ = 18824158656.

The previous prime is 28238770141. The next prime is 28238770181. The reversal of 28238770143 is 34107783282.

It is not a de Polignac number, because 28238770143 - 2¹ = 28238770141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28238770141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30163 + ... + 239556.

It is an arithmetic number, because the mean of its divisors is an integer number (3399416020).

Almost surely, 2^28238770143 is an apocalyptic number.

28238770143 is a deficient number, since it is larger than the sum of its proper divisors (12554222097).

28238770143 is a wasteful number, since it uses less digits than its factorization.

28238770143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281358 (or 281355 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 28238770143 in words is "twenty-eight billion, two hundred thirty-eight million, seven hundred seventy thousand, one hundred forty-three".