988666538 has 16 divisors (see below), whose sum is σ = 1522402560. Its totient is φ = 481250400.

The previous prime is 988666537. The next prime is 988666541. The reversal of 988666538 is 835666889.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (988666531) 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, 26693 + ... + 51863.

It is an arithmetic number, because the mean of its divisors is an integer number (95150160).

Almost surely, 2^988666538 is an apocalyptic number.

988666538 is a deficient number, since it is larger than the sum of its proper divisors (533736022).

988666538 is a wasteful number, since it uses less digits than its factorization.

988666538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25693.

The product of its digits is 14929920, while the sum is 59.

The square root of 988666538 is about 31443.0682027057. The cubic root of 988666538 is about 996.2078168584.

The spelling of 988666538 in words is "nine hundred eighty-eight million, six hundred sixty-six thousand, five hundred thirty-eight".