440423139 has 8 divisors (see below), whose sum is σ = 632402512. Its totient is φ = 271029600.

The previous prime is 440423117. The next prime is 440423161. The reversal of 440423139 is 931324044.

It is an interprime number because it is at equal distance from previous prime (440423117) and next prime (440423161).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 440423139 - 2⁹ = 440422627 is a prime.

It is a super-2 number, since 2×440423139² = 387945082733226642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440423339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5646412 + ... + 5646489.

It is an arithmetic number, because the mean of its divisors is an integer number (79050314).

Almost surely, 2^440423139 is an apocalyptic number.

440423139 is a deficient number, since it is larger than the sum of its proper divisors (191979373).

440423139 is a wasteful number, since it uses less digits than its factorization.

440423139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11292917.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 440423139 is about 20986.2607198138. The cubic root of 440423139 is about 760.8342288097.

The spelling of 440423139 in words is "four hundred forty million, four hundred twenty-three thousand, one hundred thirty-nine".