128737889 has 16 divisors (see below), whose sum is σ = 156763008. Its totient is φ = 103203072.

The previous prime is 128737883. The next prime is 128737891. The reversal of 128737889 is 988737821.

It is not a de Polignac number, because 128737889 - 2¹⁶ = 128672353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128737889.

It is not an unprimeable number, because it can be changed into a prime (128737883) 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 15 ways as a sum of consecutive naturals, for example, 16079 + ... + 22715.

It is an arithmetic number, because the mean of its divisors is an integer number (9797688).

Almost surely, 2^128737889 is an apocalyptic number.

It is an amenable number.

128737889 is a deficient number, since it is larger than the sum of its proper divisors (28025119).

128737889 is a wasteful number, since it uses less digits than its factorization.

128737889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6824.

The product of its digits is 1354752, while the sum is 53.

The square root of 128737889 is about 11346.2720309360. The cubic root of 128737889 is about 504.9349836241.

The spelling of 128737889 in words is "one hundred twenty-eight million, seven hundred thirty-seven thousand, eight hundred eighty-nine".