38443644 has 18 divisors (see below), whose sum is σ = 97177080. Its totient is φ = 12814536.

The previous prime is 38443621. The next prime is 38443661. The reversal of 38443644 is 44634483.

38443644 is a `hidden beast` number, since 3 + 8 + 4 + 4 + 3 + 644 = 666.

38443644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1067879 = 38443644 / (3 + 8 + 4 + 4 + 3 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 38443599 and 38443608.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 533904 + ... + 533975.

Almost surely, 2^38443644 is an apocalyptic number.

It is an amenable number.

38443644 is an abundant number, since it is smaller than the sum of its proper divisors (58733436).

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

38443644 is a wasteful number, since it uses less digits than its factorization.

38443644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067889 (or 1067884 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 38443644 is about 6200.2938640035. The cubic root of 38443644 is about 337.5008329198.

The spelling of 38443644 in words is "thirty-eight million, four hundred forty-three thousand, six hundred forty-four".