49999644 has 36 divisors (see below), whose sum is σ = 126726600. Its totient is φ = 16621920.

The previous prime is 49999643. The next prime is 49999667. The reversal of 49999644 is 44699994.

49999644 is a `hidden beast` number, since 499 + 99 + 64 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13507 + ... + 16805.

Almost surely, 2^49999644 is an apocalyptic number.

It is an amenable number.

49999644 is an abundant number, since it is smaller than the sum of its proper divisors (76726956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49999644 is a wasteful number, since it uses less digits than its factorization.

49999644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730 (or 3725 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 49999644 is about 7071.0426388193. The cubic root of 49999644 is about 368.4022755185.

The spelling of 49999644 in words is "forty-nine million, nine hundred ninety-nine thousand, six hundred forty-four".