49639636 has 6 divisors (see below), whose sum is σ = 86869370. Its totient is φ = 24819816.

The previous prime is 49639631. The next prime is 49639637. The reversal of 49639636 is 63693694.

It can be written as a sum of positive squares in only one way, i.e., 36360900 + 13278736 = 6030^2 + 3644^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49639631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6204951 + ... + 6204958.

Almost surely, 2^49639636 is an apocalyptic number.

It is an amenable number.

49639636 is a deficient number, since it is larger than the sum of its proper divisors (37229734).

49639636 is a wasteful number, since it uses less digits than its factorization.

49639636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12409913 (or 12409911 counting only the distinct ones).

The product of its digits is 629856, while the sum is 46.

The square root of 49639636 is about 7045.5401496266. The cubic root of 49639636 is about 367.5159534623.

The spelling of 49639636 in words is "forty-nine million, six hundred thirty-nine thousand, six hundred thirty-six".