39438820 has 24 divisors (see below), whose sum is σ = 85494528. Its totient is φ = 15266400.

The previous prime is 39438799. The next prime is 39438821. The reversal of 39438820 is 2883493.

39438820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 39438820.

It is not an unprimeable number, because it can be changed into a prime (39438821) 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, 31186 + ... + 32425.

It is an arithmetic number, because the mean of its divisors is an integer number (3562272).

Almost surely, 2^39438820 is an apocalyptic number.

It is an amenable number.

39438820 is an abundant number, since it is smaller than the sum of its proper divisors (46055708).

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

39438820 is a wasteful number, since it uses less digits than its factorization.

39438820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63651 (or 63649 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 39438820 is about 6280.0334394014. The cubic root of 39438820 is about 340.3883106706.

The spelling of 39438820 in words is "thirty-nine million, four hundred thirty-eight thousand, eight hundred twenty".