261848180 has 48 divisors (see below), whose sum is σ = 602985600. Its totient is φ = 94723200.

The previous prime is 261848159. The next prime is 261848183. The reversal of 261848180 is 81848162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261848183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40790 + ... + 46770.

It is an arithmetic number, because the mean of its divisors is an integer number (12562200).

Almost surely, 2^261848180 is an apocalyptic number.

261848180 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 261848180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301492800).

261848180 is an abundant number, since it is smaller than the sum of its proper divisors (341137420).

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

261848180 is a wasteful number, since it uses less digits than its factorization.

261848180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200 (or 6198 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 261848180 is about 16181.7236411947. The cubic root of 261848180 is about 639.7591704558.

The spelling of 261848180 in words is "two hundred sixty-one million, eight hundred forty-eight thousand, one hundred eighty".