128340456 has 32 divisors (see below), whose sum is σ = 327680640. Its totient is φ = 41869568.

The previous prime is 128340439. The next prime is 128340467. The reversal of 128340456 is 654043821.

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, 55761 + ... + 58016.

It is an arithmetic number, because the mean of its divisors is an integer number (10240020).

Almost surely, 2^128340456 is an apocalyptic number.

It is an amenable number.

128340456 is an abundant number, since it is smaller than the sum of its proper divisors (199340184).

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

128340456 is a wasteful number, since it uses less digits than its factorization.

128340456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113833 (or 113829 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 128340456 is about 11328.7446789130. The cubic root of 128340456 is about 504.4148448904.

The spelling of 128340456 in words is "one hundred twenty-eight million, three hundred forty thousand, four hundred fifty-six".