128315860 has 24 divisors (see below), whose sum is σ = 269853696. Its totient is φ = 51252000.

The previous prime is 128315843. The next prime is 128315861. The reversal of 128315860 is 68513821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128315861) 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, 10749 + ... + 19291.

It is an arithmetic number, because the mean of its divisors is an integer number (11243904).

Almost surely, 2^128315860 is an apocalyptic number.

128315860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128315860 is an abundant number, since it is smaller than the sum of its proper divisors (141537836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128315860 is a wasteful number, since it uses less digits than its factorization.

128315860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9303 (or 9301 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 128315860 is about 11327.6590697284. The cubic root of 128315860 is about 504.3826197174.

The spelling of 128315860 in words is "one hundred twenty-eight million, three hundred fifteen thousand, eight hundred sixty".