49857939 has 12 divisors (see below), whose sum is σ = 72092176. Its totient is φ = 33203952.

The previous prime is 49857917. The next prime is 49857949. The reversal of 49857939 is 93975894.

It is not a de Polignac number, because 49857939 - 2⁹ = 49857427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49857949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8634 + ... + 13200.

Almost surely, 2^49857939 is an apocalyptic number.

49857939 is a deficient number, since it is larger than the sum of its proper divisors (22234237).

49857939 is a wasteful number, since it uses less digits than its factorization.

49857939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786 (or 5783 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 49857939 is about 7061.0154368901. The cubic root of 49857939 is about 368.0539141039.

The spelling of 49857939 in words is "forty-nine million, eight hundred fifty-seven thousand, nine hundred thirty-nine".