128624089 has 6 divisors (see below), whose sum is σ = 141380330. Its totient is φ = 116930880.

The previous prime is 128624081. The next prime is 128624107. The reversal of 128624089 is 980426821.

It can be written as a sum of positive squares in only one way, i.e., 98010000 + 30614089 = 9900^2 + 5533^2 .

It is not a de Polignac number, because 128624089 - 2³ = 128624081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128624081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 531384 + ... + 531625.

Almost surely, 2^128624089 is an apocalyptic number.

It is an amenable number.

128624089 is a deficient number, since it is larger than the sum of its proper divisors (12756241).

128624089 is a wasteful number, since it uses less digits than its factorization.

128624089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063031 (or 1063020 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 128624089 is about 11341.2560591850. The cubic root of 128624089 is about 504.7861578684.

The spelling of 128624089 in words is "one hundred twenty-eight million, six hundred twenty-four thousand, eighty-nine".