50138990 has 16 divisors (see below), whose sum is σ = 98454960. Its totient is φ = 18232320.

The previous prime is 50138969. The next prime is 50139029. The reversal of 50138990 is 9983105.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 50138990.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 227795 + ... + 228014.

It is an arithmetic number, because the mean of its divisors is an integer number (6153435).

Almost surely, 2^50138990 is an apocalyptic number.

50138990 is a deficient number, since it is larger than the sum of its proper divisors (48315970).

50138990 is a wasteful number, since it uses less digits than its factorization.

50138990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455827.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 50138990 is about 7080.8890684716. The cubic root of 50138990 is about 368.7441964039.

The spelling of 50138990 in words is "fifty million, one hundred thirty-eight thousand, nine hundred ninety".