261836834 has 16 divisors (see below), whose sum is σ = 472488000. Its totient is φ = 106309584.

The previous prime is 261836833. The next prime is 261836849. The reversal of 261836834 is 438638162.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 261836791 and 261836800.

It is not an unprimeable number, because it can be changed into a prime (261836833) 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, 491909 + ... + 492440.

It is an arithmetic number, because the mean of its divisors is an integer number (29530500).

Almost surely, 2^261836834 is an apocalyptic number.

261836834 is a deficient number, since it is larger than the sum of its proper divisors (210651166).

261836834 is a wasteful number, since it uses less digits than its factorization.

261836834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984377.

The product of its digits is 165888, while the sum is 41.

The square root of 261836834 is about 16181.3730566970. The cubic root of 261836834 is about 639.7499299710.

The spelling of 261836834 in words is "two hundred sixty-one million, eight hundred thirty-six thousand, eight hundred thirty-four".