38444663309238 has 48 divisors (see below), whose sum is σ = 84542033462640. Its totient is φ = 12623318028288.

The previous prime is 38444663309231. The next prime is 38444663309243. The reversal of 38444663309238 is 83290336644483.

38444663309238 is a `hidden beast` number, since 3 + 8 + 4 + 4 + 4 + 66 + 330 + 9 + 238 = 666.

It is a super-2 number, since 2×38444663309238² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38444663309231) 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 23 ways as a sum of consecutive naturals, for example, 53013798 + ... + 53734086.

It is an arithmetic number, because the mean of its divisors is an integer number (1761292363805).

Almost surely, 2^{38444663309238} is an apocalyptic number.

38444663309238 is an abundant number, since it is smaller than the sum of its proper divisors (46097370153402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38444663309238 is a wasteful number, since it uses less digits than its factorization.

38444663309238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764621 (or 764618 counting only the distinct ones).

The product of its (nonzero) digits is 214990848, while the sum is 63.

The spelling of 38444663309238 in words is "thirty-eight trillion, four hundred forty-four billion, six hundred sixty-three million, three hundred nine thousand, two hundred thirty-eight".