231989652 has 72 divisors (see below), whose sum is σ = 600163200. Its totient is φ = 75535488.

The previous prime is 231989651. The next prime is 231989663. The reversal of 231989652 is 256989132.

It is a super-2 number, since 2×231989652² = 107638397270162208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231989598 and 231989607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231989651) 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, 507408 + ... + 507864.

It is an arithmetic number, because the mean of its divisors is an integer number (8335600).

Almost surely, 2^231989652 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 231989652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300081600).

231989652 is an abundant number, since it is smaller than the sum of its proper divisors (368173548).

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

231989652 is a wasteful number, since it uses less digits than its factorization.

231989652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 760 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 231989652 is about 15231.2065181981. The cubic root of 231989652 is about 614.4542292730.

The spelling of 231989652 in words is "two hundred thirty-one million, nine hundred eighty-nine thousand, six hundred fifty-two".