261708132 has 96 divisors (see below), whose sum is σ = 745113600. Its totient is φ = 69788160.

The previous prime is 261708131. The next prime is 261708137. The reversal of 261708132 is 231807162.

It is a super-2 number, since 2×261708132² = 136982292709858848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261708132.

It is not an unprimeable number, because it can be changed into a prime (261708131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186369 + ... + 187767.

It is an arithmetic number, because the mean of its divisors is an integer number (7761600).

Almost surely, 2^261708132 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 261708132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372556800).

261708132 is an abundant number, since it is smaller than the sum of its proper divisors (483405468).

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

261708132 is a wasteful number, since it uses less digits than its factorization.

261708132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 261708132 is about 16177.3957113004. The cubic root of 261708132 is about 639.6450929389.

The spelling of 261708132 in words is "two hundred sixty-one million, seven hundred eight thousand, one hundred thirty-two".