988406181 has 12 divisors (see below), whose sum is σ = 1631654752. Its totient is φ = 564803496.

The previous prime is 988406179. The next prime is 988406189. The reversal of 988406181 is 181604889.

It is not a de Polignac number, because 988406181 - 2¹ = 988406179 is a prime.

It is a super-2 number, since 2×988406181² = 1953893557278009522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988406189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7844431 + ... + 7844556.

Almost surely, 2^988406181 is an apocalyptic number.

It is an amenable number.

988406181 is a deficient number, since it is larger than the sum of its proper divisors (643248571).

988406181 is a wasteful number, since it uses less digits than its factorization.

988406181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15689000 (or 15688997 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 988406181 is about 31438.9277966027. The cubic root of 988406181 is about 996.1203615370.

The spelling of 988406181 in words is "nine hundred eighty-eight million, four hundred six thousand, one hundred eighty-one".