38718644 has 6 divisors (see below), whose sum is σ = 67757634. Its totient is φ = 19359320.

The previous prime is 38718629. The next prime is 38718671. The reversal of 38718644 is 44681783.

38718644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 36120100 + 2598544 = 6010^2 + 1612^2 .

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 as a sum of consecutive naturals, namely, 4839827 + ... + 4839834.

It is an arithmetic number, because the mean of its divisors is an integer number (11292939).

Almost surely, 2^38718644 is an apocalyptic number.

It is an amenable number.

38718644 is a deficient number, since it is larger than the sum of its proper divisors (29038990).

38718644 is a wasteful number, since it uses less digits than its factorization.

38718644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9679665 (or 9679663 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 38718644 is about 6222.4307147609. The cubic root of 38718644 is about 338.3036730263.

The spelling of 38718644 in words is "thirty-eight million, seven hundred eighteen thousand, six hundred forty-four".