440155039 has 2 divisors, whose sum is σ = 440155040. Its totient is φ = 440155038.

The previous prime is 440155013. The next prime is 440155087. The reversal of 440155039 is 930551044.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 440155039 - 2⁹ = 440154527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 440155039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440155099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220077519 + 220077520.

It is an arithmetic number, because the mean of its divisors is an integer number (220077520).

Almost surely, 2^440155039 is an apocalyptic number.

440155039 is a deficient number, since it is larger than the sum of its proper divisors (1).

440155039 is an equidigital number, since it uses as much as digits as its factorization.

440155039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 440155039 is about 20979.8722350733. The cubic root of 440155039 is about 760.6798158960.

The spelling of 440155039 in words is "four hundred forty million, one hundred fifty-five thousand, thirty-nine".