235665136 has 120 divisors (see below), whose sum is σ = 565276320. Its totient is φ = 93090816.

The previous prime is 235665121. The next prime is 235665139. The reversal of 235665136 is 631566532.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 235665095 and 235665104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235665139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4446486 + ... + 4446538.

It is an arithmetic number, because the mean of its divisors is an integer number (4710636).

Almost surely, 2^235665136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 235665136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282638160).

235665136 is an abundant number, since it is smaller than the sum of its proper divisors (329611184).

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

235665136 is a wasteful number, since it uses less digits than its factorization.

235665136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 128 counting only the distinct ones).

The product of its digits is 97200, while the sum is 37.

The square root of 235665136 is about 15351.3887319682. The cubic root of 235665136 is about 617.6822376776.

The spelling of 235665136 in words is "two hundred thirty-five million, six hundred sixty-five thousand, one hundred thirty-six".