128525814 has 72 divisors (see below), whose sum is σ = 305742528. Its totient is φ = 38972160.

The previous prime is 128525809. The next prime is 128525821. The reversal of 128525814 is 418525821.

128525814 is a `hidden beast` number, since 1 + 28 + 52 + 581 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 160864 + ... + 161660.

It is an arithmetic number, because the mean of its divisors is an integer number (4246424).

Almost surely, 2^128525814 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128525814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152871264).

128525814 is an abundant number, since it is smaller than the sum of its proper divisors (177216714).

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

128525814 is a wasteful number, since it uses less digits than its factorization.

128525814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 850 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 128525814 is about 11336.9225983068. The cubic root of 128525814 is about 504.6575647988.

The spelling of 128525814 in words is "one hundred twenty-eight million, five hundred twenty-five thousand, eight hundred fourteen".