440158139 has 4 divisors (see below), whose sum is σ = 440771040. Its totient is φ = 439545240.

The previous prime is 440158129. The next prime is 440158177. The reversal of 440158139 is 931851044.

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

It is a cyclic number.

It is not a de Polignac number, because 440158139 - 2²⁰ = 439109563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440158099 and 440158108.

It is not an unprimeable number, because it can be changed into a prime (440158129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305372 + ... + 306809.

It is an arithmetic number, because the mean of its divisors is an integer number (110192760).

Almost surely, 2^440158139 is an apocalyptic number.

440158139 is a deficient number, since it is larger than the sum of its proper divisors (612901).

440158139 is an equidigital number, since it uses as much as digits as its factorization.

440158139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612900.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 440158139 is about 20979.9461152788. The cubic root of 440158139 is about 760.6816017076.

The spelling of 440158139 in words is "four hundred forty million, one hundred fifty-eight thousand, one hundred thirty-nine".