39805980 has 48 divisors (see below), whose sum is σ = 115305120. Its totient is φ = 10248448.

The previous prime is 39805907. The next prime is 39806029. The reversal of 39805980 is 8950893.

39805980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9699 + ... + 13178.

It is an arithmetic number, because the mean of its divisors is an integer number (2402190).

Almost surely, 2^39805980 is an apocalyptic number.

39805980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39805980 is an abundant number, since it is smaller than the sum of its proper divisors (75499140).

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

39805980 is a wasteful number, since it uses less digits than its factorization.

39805980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22918 (or 22916 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 39805980 is about 6309.1980472957. The cubic root of 39805980 is about 341.4413436697.

The spelling of 39805980 in words is "thirty-nine million, eight hundred five thousand, nine hundred eighty".