261767874 has 16 divisors (see below), whose sum is σ = 523717920. Its totient is φ = 87225600.

The previous prime is 261767873. The next prime is 261767893. The reversal of 261767874 is 478767162.

It is not an unprimeable number, because it can be changed into a prime (261767873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17442 + ... + 28770.

It is an arithmetic number, because the mean of its divisors is an integer number (32732370).

Almost surely, 2^261767874 is an apocalyptic number.

261767874 is an abundant number, since it is smaller than the sum of its proper divisors (261950046).

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

261767874 is a wasteful number, since it uses less digits than its factorization.

261767874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15185.

The product of its digits is 790272, while the sum is 48.

The square root of 261767874 is about 16179.2420712467. The cubic root of 261767874 is about 639.6937613664.

The spelling of 261767874 in words is "two hundred sixty-one million, seven hundred sixty-seven thousand, eight hundred seventy-four".