988639664 has 10 divisors (see below), whose sum is σ = 1915489380. Its totient is φ = 494319824.

The previous prime is 988639651. The next prime is 988639669. The reversal of 988639664 is 466936889.

It is not an unprimeable number, because it can be changed into a prime (988639669) 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 as a sum of consecutive naturals, namely, 30894974 + ... + 30895005.

It is an arithmetic number, because the mean of its divisors is an integer number (191548938).

Almost surely, 2^988639664 is an apocalyptic number.

It is an amenable number.

988639664 is a deficient number, since it is larger than the sum of its proper divisors (926849716).

988639664 is a wasteful number, since it uses less digits than its factorization.

988639664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61789987 (or 61789981 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 59.

The square root of 988639664 is about 31442.6408560095. The cubic root of 988639664 is about 996.1987904474.

The spelling of 988639664 in words is "nine hundred eighty-eight million, six hundred thirty-nine thousand, six hundred sixty-four".