231636340 has 96 divisors (see below), whose sum is σ = 559964160. Its totient is φ = 79833600.

The previous prime is 231636331. The next prime is 231636359. The reversal of 231636340 is 43636132.

231636340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231636299 and 231636308.

It is a congruent number.

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, 233245 + ... + 234235.

It is an arithmetic number, because the mean of its divisors is an integer number (5832960).

Almost surely, 2^231636340 is an apocalyptic number.

231636340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231636340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279982080).

231636340 is an abundant number, since it is smaller than the sum of its proper divisors (328327820).

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

231636340 is a wasteful number, since it uses less digits than its factorization.

231636340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 231636340 is about 15219.6038056186. The cubic root of 231636340 is about 614.1421401303.

The spelling of 231636340 in words is "two hundred thirty-one million, six hundred thirty-six thousand, three hundred forty".