128452686 has 8 divisors (see below), whose sum is σ = 256905384. Its totient is φ = 42817560.

The previous prime is 128452661. The next prime is 128452691. The reversal of 128452686 is 686254821.

It is a sphenic number, since it is the product of 3 distinct primes.

128452686 is an admirable number.

It is a super-2 number, since 2×128452686² = 33000185081229192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10704385 + ... + 10704396.

It is an arithmetic number, because the mean of its divisors is an integer number (32113173).

Almost surely, 2^128452686 is an apocalyptic number.

128452686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128452686 is a wasteful number, since it uses less digits than its factorization.

128452686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21408786.

The product of its digits is 184320, while the sum is 42.

The square root of 128452686 is about 11333.6969255402. The cubic root of 128452686 is about 504.5618340950.

The spelling of 128452686 in words is "one hundred twenty-eight million, four hundred fifty-two thousand, six hundred eighty-six".