28081470231 has 32 divisors (see below), whose sum is σ = 42396691200. Its totient is φ = 18365084640.

The previous prime is 28081470227. The next prime is 28081470283. The reversal of 28081470231 is 13207418082.

28081470231 is a `hidden beast` number, since 2 + 80 + 81 + 470 + 2 + 31 = 666.

It is not a de Polignac number, because 28081470231 - 2² = 28081470227 is a prime.

It is a super-2 number, since 2×28081470231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081470631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 601720 + ... + 646706.

It is an arithmetic number, because the mean of its divisors is an integer number (1324896600).

Almost surely, 2^28081470231 is an apocalyptic number.

28081470231 is a deficient number, since it is larger than the sum of its proper divisors (14315220969).

28081470231 is a wasteful number, since it uses less digits than its factorization.

28081470231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45436 (or 45430 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 28081470231 in words is "twenty-eight billion, eighty-one million, four hundred seventy thousand, two hundred thirty-one".