44398138690 has 32 divisors (see below), whose sum is σ = 82264034160. Its totient is φ = 17244524544.

The previous prime is 44398138663. The next prime is 44398138693. The reversal of 44398138690 is 9683189344.

It can be written as a sum of positive squares in 8 ways, for example, as 8539792921 + 35858345769 = 92411^2 + 189363^2 .

It is a super-2 number, since 2×44398138690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (44398138693) 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 15 ways as a sum of consecutive naturals, for example, 380395 + ... + 483214.

Almost surely, 2^44398138690 is an apocalyptic number.

44398138690 is a deficient number, since it is larger than the sum of its proper divisors (37865895470).

44398138690 is a wasteful number, since it uses less digits than its factorization.

44398138690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863766.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 44398138690 in words is "forty-four billion, three hundred ninety-eight million, one hundred thirty-eight thousand, six hundred ninety".