440802389 has 2 divisors, whose sum is σ = 440802390. Its totient is φ = 440802388.

The previous prime is 440802379. The next prime is 440802433. The reversal of 440802389 is 983208044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438567364 + 2235025 = 20942^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 440802389 - 2⁸ = 440802133 is a prime.

It is a super-2 number, since 2×440802389² = 388613492296214642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440802319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220401194 + 220401195.

It is an arithmetic number, because the mean of its divisors is an integer number (220401195).

Almost surely, 2^440802389 is an apocalyptic number.

It is an amenable number.

440802389 is a deficient number, since it is larger than the sum of its proper divisors (1).

440802389 is an equidigital number, since it uses as much as digits as its factorization.

440802389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 440802389 is about 20995.2944489950. The cubic root of 440802389 is about 761.0525518817.

The spelling of 440802389 in words is "four hundred forty million, eight hundred two thousand, three hundred eighty-nine".