38721708 has 36 divisors (see below), whose sum is σ = 98240688. Its totient is φ = 12859680.

The previous prime is 38721707. The next prime is 38721713. The reversal of 38721708 is 80712783.

38721708 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 (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (38721701) 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 11 ways as a sum of consecutive naturals, for example, 8713 + ... + 12383.

It is an arithmetic number, because the mean of its divisors is an integer number (2728908).

Almost surely, 2^38721708 is an apocalyptic number.

It is an amenable number.

38721708 is an abundant number, since it is smaller than the sum of its proper divisors (59518980).

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

38721708 is a wasteful number, since it uses less digits than its factorization.

38721708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974 (or 3969 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 38721708 is about 6222.6769159261. The cubic root of 38721708 is about 338.3125966783.

The spelling of 38721708 in words is "thirty-eight million, seven hundred twenty-one thousand, seven hundred eight".