261224386 has 32 divisors (see below), whose sum is σ = 420837120. Its totient is φ = 121328064.

The previous prime is 261224351. The next prime is 261224401. The reversal of 261224386 is 683422162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265251 + ... + 266233.

It is an arithmetic number, because the mean of its divisors is an integer number (13151160).

Almost surely, 2^261224386 is an apocalyptic number.

261224386 is a deficient number, since it is larger than the sum of its proper divisors (159612734).

261224386 is a wasteful number, since it uses less digits than its factorization.

261224386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170.

The product of its digits is 27648, while the sum is 34.

The square root of 261224386 is about 16162.4375018127. The cubic root of 261224386 is about 639.2507393791.

The spelling of 261224386 in words is "two hundred sixty-one million, two hundred twenty-four thousand, three hundred eighty-six".