438446906690 has 16 divisors (see below), whose sum is σ = 849912465528. Its totient is φ = 161888088576.

The previous prime is 438446906671. The next prime is 438446906699. The reversal of 438446906690 is 96609644834.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 320585837209 + 117861069481 = 566203^2 + 343309^2 .

It is a super-2 number, since 2×438446906690² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (438446906699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1686334127 + ... + 1686334386.

Almost surely, 2^438446906690 is an apocalyptic number.

438446906690 is a deficient number, since it is larger than the sum of its proper divisors (411465558838).

438446906690 is a wasteful number, since it uses less digits than its factorization.

438446906690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372668533.

The product of its (nonzero) digits is 26873856, while the sum is 59.

The spelling of 438446906690 in words is "four hundred thirty-eight billion, four hundred forty-six million, nine hundred six thousand, six hundred ninety".