261841190 has 64 divisors (see below), whose sum is σ = 536481792. Its totient is φ = 91324800.

The previous prime is 261841189. The next prime is 261841199. The reversal of 261841190 is 91148162.

It is a super-2 number, since 2×261841190² = 137121617561232200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261841199) 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, 172535 + ... + 174045.

It is an arithmetic number, because the mean of its divisors is an integer number (8382528).

Almost surely, 2^261841190 is an apocalyptic number.

261841190 is an abundant number, since it is smaller than the sum of its proper divisors (274640602).

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

261841190 is a wasteful number, since it uses less digits than its factorization.

261841190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 261841190 is about 16181.5076553453. The cubic root of 261841190 is about 639.7534776451.

The spelling of 261841190 in words is "two hundred sixty-one million, eight hundred forty-one thousand, one hundred ninety".