39409881 has 16 divisors (see below), whose sum is σ = 60144000. Its totient is φ = 22485888.

The previous prime is 39409871. The next prime is 39409889. The reversal of 39409881 is 18890493.

39409881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39409881 - 2¹⁰ = 39408857 is a prime.

It is a super-2 number, since 2×39409881² = 3106277440868322, which contains 22 as substring.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (39409889) 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 15 ways as a sum of consecutive naturals, for example, 21135 + ... + 22923.

It is an arithmetic number, because the mean of its divisors is an integer number (3759000).

Almost surely, 2^39409881 is an apocalyptic number.

It is an amenable number.

39409881 is a deficient number, since it is larger than the sum of its proper divisors (20734119).

39409881 is a wasteful number, since it uses less digits than its factorization.

39409881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2848.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 39409881 is about 6277.7289683452. The cubic root of 39409881 is about 340.3050347880.

The spelling of 39409881 in words is "thirty-nine million, four hundred nine thousand, eight hundred eighty-one".