27830081538 has 24 divisors (see below), whose sum is σ = 68912583168. Its totient is φ = 7951451832.

The previous prime is 27830081537. The next prime is 27830081549. The reversal of 27830081538 is 83518003872.

27830081538 is a `hidden beast` number, since 2 + 7 + 8 + 30 + 0 + 81 + 538 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 27830081493 and 27830081502.

It is not an unprimeable number, because it can be changed into a prime (27830081537) 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, 110436706 + ... + 110436957.

It is an arithmetic number, because the mean of its divisors is an integer number (2871357632).

Almost surely, 2^27830081538 is an apocalyptic number.

27830081538 is an abundant number, since it is smaller than the sum of its proper divisors (41082501630).

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

27830081538 is a wasteful number, since it uses less digits than its factorization.

27830081538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220873678 (or 220873675 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 27830081538 in words is "twenty-seven billion, eight hundred thirty million, eighty-one thousand, five hundred thirty-eight".