128988937 has 8 divisors (see below), whose sum is σ = 160817472. Its totient is φ = 100510800.

The previous prime is 128988931. The next prime is 128988943. The reversal of 128988937 is 739889821.

It is an interprime number because it is at equal distance from previous prime (128988931) and next prime (128988943).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128988937 - 2¹¹ = 128986889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128988931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837514 + ... + 837667.

It is an arithmetic number, because the mean of its divisors is an integer number (20102184).

Almost surely, 2^128988937 is an apocalyptic number.

It is an amenable number.

128988937 is a deficient number, since it is larger than the sum of its proper divisors (31828535).

128988937 is a wasteful number, since it uses less digits than its factorization.

128988937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675199.

The product of its digits is 1741824, while the sum is 55.

The square root of 128988937 is about 11357.3296597396. The cubic root of 128988937 is about 505.2629901626.

The spelling of 128988937 in words is "one hundred twenty-eight million, nine hundred eighty-eight thousand, nine hundred thirty-seven".