261232832 has 56 divisors (see below), whose sum is σ = 593994240. Its totient is φ = 111663360.

The previous prime is 261232831. The next prime is 261232849. The reversal of 261232832 is 238232162.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 261232795 and 261232804.

It is not an unprimeable number, because it can be changed into a prime (261232831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321707 + ... + 322517.

It is an arithmetic number, because the mean of its divisors is an integer number (10607040).

Almost surely, 2^261232832 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 261232832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296997120).

261232832 is an abundant number, since it is smaller than the sum of its proper divisors (332761408).

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

261232832 is an equidigital number, since it uses as much as digits as its factorization.

261232832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549 (or 1539 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 261232832 is about 16162.6987845471. The cubic root of 261232832 is about 639.2576287991.

Adding to 261232832 its reverse (238232162), we get a palindrome (499464994).

The spelling of 261232832 in words is "two hundred sixty-one million, two hundred thirty-two thousand, eight hundred thirty-two".