4990821890 has 8 divisors (see below), whose sum is σ = 8983479420. Its totient is φ = 1996328752.

The previous prime is 4990821889. The next prime is 4990821929. The reversal of 4990821890 is 981280994.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4936608121 + 54213769 = 70261^2 + 7363^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249541085 + ... + 249541104.

Almost surely, 2^4990821890 is an apocalyptic number.

4990821890 is a deficient number, since it is larger than the sum of its proper divisors (3992657530).

4990821890 is a wasteful number, since it uses less digits than its factorization.

4990821890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499082196.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 4990821890 is about 70645.7492705683. The cubic root of 4990821890 is about 1708.9290160031.

The spelling of 4990821890 in words is "four billion, nine hundred ninety million, eight hundred twenty-one thousand, eight hundred ninety".