444137690 has 8 divisors (see below), whose sum is σ = 799447860. Its totient is φ = 177655072.

The previous prime is 444137689. The next prime is 444137717. The reversal of 444137690 is 96731444.

It can be written as a sum of positive squares in 2 ways, for example, as 416690569 + 27447121 = 20413^2 + 5239^2 .

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

It is a super-2 number, since 2×444137690² = 394516575357072200, which contains 22 as substring.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 22206875 + ... + 22206894.

Almost surely, 2^444137690 is an apocalyptic number.

444137690 is a deficient number, since it is larger than the sum of its proper divisors (355310170).

444137690 is a wasteful number, since it uses less digits than its factorization.

444137690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44413776.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 444137690 is about 21074.5744915526. The cubic root of 444137690 is about 762.9672148693.

The spelling of 444137690 in words is "four hundred forty-four million, one hundred thirty-seven thousand, six hundred ninety".