27928931658 has 32 divisors (see below), whose sum is σ = 56186866176. Its totient is φ = 9254927808.

The previous prime is 27928931623. The next prime is 27928931659. The reversal of 27928931658 is 85613982972.

It is not an unprimeable number, because it can be changed into a prime (27928931659) 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, 966516 + ... + 994992.

It is an arithmetic number, because the mean of its divisors is an integer number (1755839568).

Almost surely, 2^27928931658 is an apocalyptic number.

27928931658 is an abundant number, since it is smaller than the sum of its proper divisors (28257934518).

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

27928931658 is a wasteful number, since it uses less digits than its factorization.

27928931658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29438.

The product of its digits is 13063680, while the sum is 60.

The spelling of 27928931658 in words is "twenty-seven billion, nine hundred twenty-eight million, nine hundred thirty-one thousand, six hundred fifty-eight".