128628093 has 16 divisors (see below), whose sum is σ = 191448576. Its totient is φ = 76142640.

The previous prime is 128628091. The next prime is 128628107. The reversal of 128628093 is 390826821.

It is a happy number.

It is not a de Polignac number, because 128628093 - 2¹ = 128628091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128628091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43905 + ... + 46742.

It is an arithmetic number, because the mean of its divisors is an integer number (11965536).

Almost surely, 2^128628093 is an apocalyptic number.

It is an amenable number.

128628093 is a deficient number, since it is larger than the sum of its proper divisors (62820483).

128628093 is a wasteful number, since it uses less digits than its factorization.

128628093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90704.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 128628093 is about 11341.4325814687. The cubic root of 128628093 is about 504.7913957229.

The spelling of 128628093 in words is "one hundred twenty-eight million, six hundred twenty-eight thousand, ninety-three".