988666540 has 24 divisors (see below), whose sum is σ = 2111392080. Its totient is φ = 388763328.

The previous prime is 988666537. The next prime is 988666541. The reversal of 988666540 is 45666889.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (988666541) 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 7 ways as a sum of consecutive naturals, for example, 417747 + ... + 420106.

It is an arithmetic number, because the mean of its divisors is an integer number (87974670).

Almost surely, 2^988666540 is an apocalyptic number.

It is an amenable number.

988666540 is an abundant number, since it is smaller than the sum of its proper divisors (1122725540).

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

988666540 is a wasteful number, since it uses less digits than its factorization.

988666540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837921 (or 837919 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The square root of 988666540 is about 31443.0682345092. The cubic root of 988666540 is about 996.2078175301.

The spelling of 988666540 in words is "nine hundred eighty-eight million, six hundred sixty-six thousand, five hundred forty".