261767338 has 16 divisors (see below), whose sum is σ = 451342080. Its totient is φ = 111536496.

The previous prime is 261767333. The next prime is 261767339. The reversal of 261767338 is 833767162.

It is a junction number, because it is equal to n+sod(n) for n = 261767294 and 261767303.

It is not an unprimeable number, because it can be changed into a prime (261767333) 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, 51618 + ... + 56461.

It is an arithmetic number, because the mean of its divisors is an integer number (28208880).

Almost surely, 2^261767338 is an apocalyptic number.

261767338 is a deficient number, since it is larger than the sum of its proper divisors (189574742).

261767338 is a wasteful number, since it uses less digits than its factorization.

261767338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108261.

The product of its digits is 254016, while the sum is 43.

The square root of 261767338 is about 16179.2255068035. The cubic root of 261767338 is about 639.6933247505.

The spelling of 261767338 in words is "two hundred sixty-one million, seven hundred sixty-seven thousand, three hundred thirty-eight".