49921990 has 16 divisors (see below), whose sum is σ = 91772352. Its totient is φ = 19543744.

The previous prime is 49921957. The next prime is 49922009. The reversal of 49921990 is 9912994.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52639 + ... + 53578.

It is an arithmetic number, because the mean of its divisors is an integer number (5735772).

Almost surely, 2^49921990 is an apocalyptic number.

49921990 is a deficient number, since it is larger than the sum of its proper divisors (41850362).

49921990 is a wasteful number, since it uses less digits than its factorization.

49921990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106271.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 49921990 is about 7065.5495186150. The cubic root of 49921990 is about 368.2114559377.

The spelling of 49921990 in words is "forty-nine million, nine hundred twenty-one thousand, nine hundred ninety".