27857115988 has 48 divisors (see below), whose sum is σ = 54986843520. Its totient is φ = 12252265344.

The previous prime is 27857115971. The next prime is 27857115989. The reversal of 27857115988 is 88951175872.

It is a super-2 number, since 2×27857115988² (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 (27857115989) 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, 278431 + ... + 365017.

It is an arithmetic number, because the mean of its divisors is an integer number (1145559240).

Almost surely, 2^27857115988 is an apocalyptic number.

It is an amenable number.

27857115988 is a deficient number, since it is larger than the sum of its proper divisors (27129727532).

27857115988 is a wasteful number, since it uses less digits than its factorization.

27857115988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86896 (or 86894 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 61.

The spelling of 27857115988 in words is "twenty-seven billion, eight hundred fifty-seven million, one hundred fifteen thousand, nine hundred eighty-eight".