39856161 has 8 divisors (see below), whose sum is σ = 53420544. Its totient is φ = 26431280.

The previous prime is 39856151. The next prime is 39856181. The reversal of 39856161 is 16165893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39856161 - 2⁶ = 39856097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39856151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34206 + ... + 35351.

It is an arithmetic number, because the mean of its divisors is an integer number (6677568).

Almost surely, 2^39856161 is an apocalyptic number.

It is an amenable number.

39856161 is a deficient number, since it is larger than the sum of its proper divisors (13564383).

39856161 is a wasteful number, since it uses less digits than its factorization.

39856161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69751.

The product of its digits is 38880, while the sum is 39.

The square root of 39856161 is about 6313.1736076240. The cubic root of 39856161 is about 341.5847615952.

The spelling of 39856161 in words is "thirty-nine million, eight hundred fifty-six thousand, one hundred sixty-one".