888888981 has 16 divisors (see below), whose sum is σ = 1248969600. Its totient is φ = 561211200.

The previous prime is 888888971. The next prime is 888888983. The reversal of 888888981 is 189888888.

It is not a de Polignac number, because 888888981 - 2¹⁰ = 888887957 is a prime.

It is a super-2 number, since 2×888888981² = 1580247241086436722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (888888983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56806 + ... + 70743.

It is an arithmetic number, because the mean of its divisors is an integer number (78060600).

Almost surely, 2^888888981 is an apocalyptic number.

It is an amenable number.

888888981 is a deficient number, since it is larger than the sum of its proper divisors (360080619).

888888981 is a wasteful number, since it uses less digits than its factorization.

888888981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127676.

The product of its digits is 18874368, while the sum is 66.

The square root of 888888981 is about 29814.2412447475. The cubic root of 888888981 is about 961.4997467501.

The spelling of 888888981 in words is "eight hundred eighty-eight million, eight hundred eighty-eight thousand, nine hundred eighty-one".