38710721 has 8 divisors (see below), whose sum is σ = 44399424. Its totient is φ = 33061680.

The previous prime is 38710703. The next prime is 38710739. The reversal of 38710721 is 12701783.

38710721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (38710703) and next prime (38710739).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38710721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38710741) 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 in 7 ways as a sum of consecutive naturals, for example, 7790 + ... + 11751.

It is an arithmetic number, because the mean of its divisors is an integer number (5549928).

Almost surely, 2^38710721 is an apocalyptic number.

It is an amenable number.

38710721 is a deficient number, since it is larger than the sum of its proper divisors (5688703).

38710721 is a wasteful number, since it uses less digits than its factorization.

38710721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19831.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 38710721 is about 6221.7940338780. The cubic root of 38710721 is about 338.2805957473.

The spelling of 38710721 in words is "thirty-eight million, seven hundred ten thousand, seven hundred twenty-one".