444312290 has 8 divisors (see below), whose sum is σ = 799762140. Its totient is φ = 177724912.

The previous prime is 444312287. The next prime is 444312293. The reversal of 444312290 is 92213444.

It is an interprime number because it is at equal distance from previous prime (444312287) and next prime (444312293).

It can be written as a sum of positive squares in 2 ways, for example, as 444239929 + 72361 = 21077^2 + 269^2 .

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

It is a super-2 number, since 2×444312290² = 394826822090088200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (444312293) 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, 22215605 + ... + 22215624.

Almost surely, 2^444312290 is an apocalyptic number.

444312290 is a deficient number, since it is larger than the sum of its proper divisors (355449850).

444312290 is a wasteful number, since it uses less digits than its factorization.

444312290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44431236.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 444312290 is about 21078.7165169040. The cubic root of 444312290 is about 763.0671813332.

The spelling of 444312290 in words is "four hundred forty-four million, three hundred twelve thousand, two hundred ninety".