128865846 has 16 divisors (see below), whose sum is σ = 259157808. Its totient is φ = 42717600.

The previous prime is 128865787. The next prime is 128865851. The reversal of 128865846 is 648568821.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128865795 and 128865804.

It is a congruent number.

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, 58245 + ... + 60416.

It is an arithmetic number, because the mean of its divisors is an integer number (16197363).

Almost surely, 2^128865846 is an apocalyptic number.

128865846 is an abundant number, since it is smaller than the sum of its proper divisors (130291962).

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

128865846 is a wasteful number, since it uses less digits than its factorization.

128865846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118847.

The product of its digits is 737280, while the sum is 48.

The square root of 128865846 is about 11351.9093548178. The cubic root of 128865846 is about 505.1022189578.

The spelling of 128865846 in words is "one hundred twenty-eight million, eight hundred sixty-five thousand, eight hundred forty-six".