440043861 has 16 divisors (see below), whose sum is σ = 622672704. Its totient is φ = 275468544.

The previous prime is 440043859. The next prime is 440043869. The reversal of 440043861 is 168340044.

It is not a de Polignac number, because 440043861 - 2¹ = 440043859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440043869) 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, 12855 + ... + 32331.

It is an arithmetic number, because the mean of its divisors is an integer number (38917044).

Almost surely, 2^440043861 is an apocalyptic number.

It is an amenable number.

440043861 is a deficient number, since it is larger than the sum of its proper divisors (182628843).

440043861 is a wasteful number, since it uses less digits than its factorization.

440043861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19940.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 440043861 is about 20977.2224329152. Note that the first 3 decimals coincide. The cubic root of 440043861 is about 760.6157642365.

The spelling of 440043861 in words is "four hundred forty million, forty-three thousand, eight hundred sixty-one".