49966138 has 4 divisors (see below), whose sum is σ = 74949210. Its totient is φ = 24983068.

The previous prime is 49966127. The next prime is 49966139. The reversal of 49966138 is 83166994.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45792289 + 4173849 = 6767^2 + 2043^2 .

It is a super-2 number, since 2×49966138² = 4993229893270088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49966139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12491533 + ... + 12491536.

Almost surely, 2^49966138 is an apocalyptic number.

49966138 is a deficient number, since it is larger than the sum of its proper divisors (24983072).

49966138 is a wasteful number, since it uses less digits than its factorization.

49966138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24983071.

The product of its digits is 279936, while the sum is 46.

The square root of 49966138 is about 7068.6730013490. The cubic root of 49966138 is about 368.3199652995.

The spelling of 49966138 in words is "forty-nine million, nine hundred sixty-six thousand, one hundred thirty-eight".