128550634 has 16 divisors (see below), whose sum is σ = 213046848. Its totient is φ = 57863872.

The previous prime is 128550613. The next prime is 128550641. The reversal of 128550634 is 436055821.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 128550634.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81412 + ... + 82975.

It is an arithmetic number, because the mean of its divisors is an integer number (13315428).

Almost surely, 2^128550634 is an apocalyptic number.

128550634 is a deficient number, since it is larger than the sum of its proper divisors (84496214).

128550634 is a wasteful number, since it uses less digits than its factorization.

128550634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164429.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 128550634 is about 11338.0171987874. The cubic root of 128550634 is about 504.6900480128.

The spelling of 128550634 in words is "one hundred twenty-eight million, five hundred fifty thousand, six hundred thirty-four".