440347381 has 4 divisors (see below), whose sum is σ = 440747712. Its totient is φ = 439947052.

The previous prime is 440347333. The next prime is 440347409. The reversal of 440347381 is 183743044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 440347381 - 2¹¹ = 440345333 is a prime.

It is a super-2 number, since 2×440347381² = 387811631907118322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440347331) 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, 198511 + ... + 200716.

It is an arithmetic number, because the mean of its divisors is an integer number (110186928).

Almost surely, 2^440347381 is an apocalyptic number.

It is an amenable number.

440347381 is a deficient number, since it is larger than the sum of its proper divisors (400331).

440347381 is a wasteful number, since it uses less digits than its factorization.

440347381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400330.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 440347381 is about 20984.4556993981. The cubic root of 440347381 is about 760.7906021398.

It can be divided in two parts, 44034 and 7381, that added together give a palindrome (51415).

The spelling of 440347381 in words is "four hundred forty million, three hundred forty-seven thousand, three hundred eighty-one".