39221680 has 20 divisors (see below), whose sum is σ = 91190592. Its totient is φ = 15688640.

The previous prime is 39221671. The next prime is 39221687. The reversal of 39221680 is 8612293.

39221680 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 (20).

It is not an unprimeable number, because it can be changed into a prime (39221687) 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 3 ways as a sum of consecutive naturals, for example, 245056 + ... + 245215.

Almost surely, 2^39221680 is an apocalyptic number.

It is an amenable number.

39221680 is an abundant number, since it is smaller than the sum of its proper divisors (51968912).

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

39221680 is a wasteful number, since it uses less digits than its factorization.

39221680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490284 (or 490278 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 39221680 is about 6262.7214531703. The cubic root of 39221680 is about 339.7624638452.

The spelling of 39221680 in words is "thirty-nine million, two hundred twenty-one thousand, six hundred eighty".