128898585 has 24 divisors (see below), whose sum is σ = 226122624. Its totient is φ = 67915680.

The previous prime is 128898571. The next prime is 128898593. The reversal of 128898585 is 585898821.

It is a happy number.

It is not a de Polignac number, because 128898585 - 2⁶ = 128898521 is a prime.

It is a super-2 number, since 2×128898585² = 33229690430004450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13521 + ... + 20990.

It is an arithmetic number, because the mean of its divisors is an integer number (9421776).

Almost surely, 2^128898585 is an apocalyptic number.

128898585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128898585 is a deficient number, since it is larger than the sum of its proper divisors (97224039).

128898585 is a wasteful number, since it uses less digits than its factorization.

128898585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34605 (or 34602 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 54.

The square root of 128898585 is about 11353.3512673571. The cubic root of 128898585 is about 505.1449899010.

The spelling of 128898585 in words is "one hundred twenty-eight million, eight hundred ninety-eight thousand, five hundred eighty-five".