261446140 has 24 divisors (see below), whose sum is σ = 556772832. Its totient is φ = 103104960.

The previous prime is 261446123. The next prime is 261446161. The reversal of 261446140 is 41644162.

261446140 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 = 261446099 and 261446108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90639 + ... + 93478.

It is an arithmetic number, because the mean of its divisors is an integer number (23198868).

Almost surely, 2^261446140 is an apocalyptic number.

261446140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261446140 is an abundant number, since it is smaller than the sum of its proper divisors (295326692).

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

261446140 is a wasteful number, since it uses less digits than its factorization.

261446140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184197 (or 184195 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 261446140 is about 16169.2962122660. The cubic root of 261446140 is about 639.4315753736.

The spelling of 261446140 in words is "two hundred sixty-one million, four hundred forty-six thousand, one hundred forty".