39856049 has 4 divisors (see below), whose sum is σ = 41141760. Its totient is φ = 38570340.

The previous prime is 39856043. The next prime is 39856051. The reversal of 39856049 is 94065893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94065893 = 1787 ⋅52639.

It is a cyclic number.

It is not a de Polignac number, because 39856049 - 2¹² = 39851953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39856043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642809 + ... + 642870.

It is an arithmetic number, because the mean of its divisors is an integer number (10285440).

Almost surely, 2^39856049 is an apocalyptic number.

It is an amenable number.

39856049 is a deficient number, since it is larger than the sum of its proper divisors (1285711).

39856049 is a wasteful number, since it uses less digits than its factorization.

39856049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285710.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 39856049 is about 6313.1647372772. The cubic root of 39856049 is about 341.5844416319.

The spelling of 39856049 in words is "thirty-nine million, eight hundred fifty-six thousand, forty-nine".