235128985 has 32 divisors (see below), whose sum is σ = 352074240. Its totient is φ = 146769408.

The previous prime is 235128979. The next prime is 235128991. The reversal of 235128985 is 589821532.

It is an interprime number because it is at equal distance from previous prime (235128979) and next prime (235128991).

It is a cyclic number.

It is not a de Polignac number, because 235128985 - 2¹⁵ = 235096217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29676 + ... + 36754.

It is an arithmetic number, because the mean of its divisors is an integer number (11002320).

Almost surely, 2^235128985 is an apocalyptic number.

It is an amenable number.

235128985 is a deficient number, since it is larger than the sum of its proper divisors (116945255).

235128985 is a wasteful number, since it uses less digits than its factorization.

235128985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7177.

The product of its digits is 172800, while the sum is 43.

The square root of 235128985 is about 15333.9161664592. The cubic root of 235128985 is about 617.2134617739.

The spelling of 235128985 in words is "two hundred thirty-five million, one hundred twenty-eight thousand, nine hundred eighty-five".