440933981 has 4 divisors (see below), whose sum is σ = 466871292. Its totient is φ = 414996672.

The previous prime is 440933953. The next prime is 440934001. The reversal of 440933981 is 189339044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212168356 + 228765625 = 14566^2 + 15125^2 .

It is a cyclic number.

It is not a de Polignac number, because 440933981 - 2⁶ = 440933917 is a prime.

It is a super-2 number, since 2×440933981² = 388845551201016722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440933881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12968630 + ... + 12968663.

It is an arithmetic number, because the mean of its divisors is an integer number (116717823).

Almost surely, 2^440933981 is an apocalyptic number.

It is an amenable number.

440933981 is a deficient number, since it is larger than the sum of its proper divisors (25937311).

440933981 is a wasteful number, since it uses less digits than its factorization.

440933981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25937310.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 440933981 is about 20998.4280602144. The cubic root of 440933981 is about 761.1282762621.

The spelling of 440933981 in words is "four hundred forty million, nine hundred thirty-three thousand, nine hundred eighty-one".