988889805 has 24 divisors (see below), whose sum is σ = 1734733728. Its totient is φ = 521051616.

The previous prime is 988889749. The next prime is 988889819. The reversal of 988889805 is 508988889.

It is not a de Polignac number, because 988889805 - 2¹⁶ = 988824269 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128647 + ... + 136116.

It is an arithmetic number, because the mean of its divisors is an integer number (72280572).

Almost surely, 2^988889805 is an apocalyptic number.

It is an amenable number.

988889805 is a deficient number, since it is larger than the sum of its proper divisors (745843923).

988889805 is a wasteful number, since it uses less digits than its factorization.

988889805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264857 (or 264854 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 63.

The square root of 988889805 is about 31446.6183396562. The cubic root of 988889805 is about 996.2828012208.

The spelling of 988889805 in words is "nine hundred eighty-eight million, eight hundred eighty-nine thousand, eight hundred five".