49684138 has 24 divisors (see below), whose sum is σ = 87203844. Its totient is φ = 21168000.

The previous prime is 49684133. The next prime is 49684139. The reversal of 49684138 is 83148694.

It can be written as a sum of positive squares in 2 ways, for example, as 44315649 + 5368489 = 6657^2 + 2317^2 .

It is a junction number, because it is equal to n+sod(n) for n = 49684094 and 49684103.

It is not an unprimeable number, because it can be changed into a prime (49684133) 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, 16338 + ... + 19138.

Almost surely, 2^49684138 is an apocalyptic number.

49684138 is a deficient number, since it is larger than the sum of its proper divisors (37519706).

49684138 is a wasteful number, since it uses less digits than its factorization.

49684138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998 (or 2991 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 49684138 is about 7048.6976101972. The cubic root of 49684138 is about 367.6257468400.

The spelling of 49684138 in words is "forty-nine million, six hundred eighty-four thousand, one hundred thirty-eight".