128575390 has 16 divisors (see below), whose sum is σ = 232258608. Its totient is φ = 51247296.

The previous prime is 128575379. The next prime is 128575393. The reversal of 128575390 is 93575821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128575393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19887 + ... + 25546.

It is an arithmetic number, because the mean of its divisors is an integer number (14516163).

Almost surely, 2^128575390 is an apocalyptic number.

128575390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128575390 is a deficient number, since it is larger than the sum of its proper divisors (103683218).

128575390 is a wasteful number, since it uses less digits than its factorization.

128575390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45723.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 128575390 is about 11339.1088715119. The cubic root of 128575390 is about 504.7224433019.

The spelling of 128575390 in words is "one hundred twenty-eight million, five hundred seventy-five thousand, three hundred ninety".