49990 has 8 divisors (see below), whose sum is σ = 90000. Its totient is φ = 19992.

The previous prime is 49957. The next prime is 49991. The reversal of 49990 is 9994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2490 + ... + 2509.

It is an arithmetic number, because the mean of its divisors is an integer number (11250).

2⁴⁹⁹⁹⁰ is an apocalyptic number.

49990 is a deficient number, since it is larger than the sum of its proper divisors (40010).

49990 is a wasteful number, since it uses less digits than its factorization.

49990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 49990 is about 223.5844359521. The cubic root of 49990 is about 36.8378588017.

Subtracting from 49990 its product of nonzero digits (2916), we obtain a palindrome (47074).

The spelling of 49990 in words is "forty-nine thousand, nine hundred ninety".