38678644 has 6 divisors (see below), whose sum is σ = 67687634. Its totient is φ = 19339320.

The previous prime is 38678641. The next prime is 38678683. The reversal of 38678644 is 44687683.

It can be written as a sum of positive squares in only one way, i.e., 31225744 + 7452900 = 5588^2 + 2730^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38678594 and 38678603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38678641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4834827 + ... + 4834834.

Almost surely, 2^38678644 is an apocalyptic number.

It is an amenable number.

38678644 is a deficient number, since it is larger than the sum of its proper divisors (29008990).

38678644 is a wasteful number, since it uses less digits than its factorization.

38678644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9669665 (or 9669663 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The square root of 38678644 is about 6219.2157061803. The cubic root of 38678644 is about 338.1871330497.

The spelling of 38678644 in words is "thirty-eight million, six hundred seventy-eight thousand, six hundred forty-four".