49971538 has 16 divisors (see below), whose sum is σ = 77479416. Its totient is φ = 24156160.

The previous prime is 49971533. The next prime is 49971599. The reversal of 49971538 is 83517994.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28376929 + 21594609 = 5327^2 + 4647^2 .

It is a super-2 number, since 2×49971538² = 4994309220170888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49971533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6570 + ... + 11962.

Almost surely, 2^49971538 is an apocalyptic number.

49971538 is a deficient number, since it is larger than the sum of its proper divisors (27507878).

49971538 is a wasteful number, since it uses less digits than its factorization.

49971538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549.

The product of its digits is 272160, while the sum is 46.

The square root of 49971538 is about 7069.0549580549. The cubic root of 49971538 is about 368.3332333263. Note that the first 3 decimals are identical.

The spelling of 49971538 in words is "forty-nine million, nine hundred seventy-one thousand, five hundred thirty-eight".