4991003898 has 16 divisors (see below), whose sum is σ = 9983459136. Its totient is φ = 1663426080.

The previous prime is 4991003893. The next prime is 4991003909. The reversal of 4991003898 is 8983001994.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4991003898.

It is not an unprimeable number, because it can be changed into a prime (4991003893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12886 + ... + 100737.

It is an arithmetic number, because the mean of its divisors is an integer number (623966196).

Almost surely, 2^4991003898 is an apocalyptic number.

4991003898 is an abundant number, since it is smaller than the sum of its proper divisors (4992455238).

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

4991003898 is a wasteful number, since it uses less digits than its factorization.

4991003898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120949.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 4991003898 is about 70647.0374325775. The cubic root of 4991003898 is about 1708.9497898007.

The spelling of 4991003898 in words is "four billion, nine hundred ninety-one million, three thousand, eight hundred ninety-eight".