44638639 has 2 divisors, whose sum is σ = 44638640. Its totient is φ = 44638638.

The previous prime is 44638631. The next prime is 44638663. The reversal of 44638639 is 93683644.

44638639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 44638639 - 2³ = 44638631 is a prime.

It is a super-3 number, since 3×44638639³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 44638595 and 44638604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44638631) 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, 22319319 + 22319320.

It is an arithmetic number, because the mean of its divisors is an integer number (22319320).

Almost surely, 2^44638639 is an apocalyptic number.

44638639 is a deficient number, since it is larger than the sum of its proper divisors (1).

44638639 is an equidigital number, since it uses as much as digits as its factorization.

44638639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 43.

The square root of 44638639 is about 6681.2153834463. The cubic root of 44638639 is about 354.7346797545.

The spelling of 44638639 in words is "forty-four million, six hundred thirty-eight thousand, six hundred thirty-nine".