261364268 has 12 divisors (see below), whose sum is σ = 498968232. Its totient is φ = 118801920.

The previous prime is 261364237. The next prime is 261364283. The reversal of 261364268 is 862463162.

It is a super-2 number, since 2×261364268² = 136622561174351648, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2970005 + ... + 2970092.

It is an arithmetic number, because the mean of its divisors is an integer number (41580686).

Almost surely, 2^261364268 is an apocalyptic number.

It is an amenable number.

261364268 is a deficient number, since it is larger than the sum of its proper divisors (237603964).

261364268 is a wasteful number, since it uses less digits than its factorization.

261364268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940112 (or 5940110 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 261364268 is about 16166.7643021107. The cubic root of 261364268 is about 639.3648222908.

The spelling of 261364268 in words is "two hundred sixty-one million, three hundred sixty-four thousand, two hundred sixty-eight".