440840861 has 16 divisors (see below), whose sum is σ = 468547200. Its totient is φ = 414120000.

The previous prime is 440840837. The next prime is 440840879. The reversal of 440840861 is 168048044.

It is not a de Polignac number, because 440840861 - 2¹⁸ = 440578717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440840891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171536 + ... + 174086.

It is an arithmetic number, because the mean of its divisors is an integer number (29284200).

Almost surely, 2^440840861 is an apocalyptic number.

It is an amenable number.

440840861 is a deficient number, since it is larger than the sum of its proper divisors (27706339).

440840861 is a wasteful number, since it uses less digits than its factorization.

440840861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740.

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 440840861 is about 20996.2106343026. The cubic root of 440840861 is about 761.0746920839.

The spelling of 440840861 in words is "four hundred forty million, eight hundred forty thousand, eight hundred sixty-one".