298991838 has 32 divisors (see below), whose sum is σ = 618347520. Its totient is φ = 96281280.

The previous prime is 298991831. The next prime is 298991839. The reversal of 298991838 is 838199892.

298991838 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×298991838² = 178792238381236488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298991831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149481 + ... + 151467.

It is an arithmetic number, because the mean of its divisors is an integer number (19323360).

Almost surely, 2^298991838 is an apocalyptic number.

298991838 is an abundant number, since it is smaller than the sum of its proper divisors (319355682).

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

298991838 is a wasteful number, since it uses less digits than its factorization.

298991838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832.

The product of its digits is 2239488, while the sum is 57.

The square root of 298991838 is about 17291.3804538562. The cubic root of 298991838 is about 668.6822231017.

The spelling of 298991838 in words is "two hundred ninety-eight million, nine hundred ninety-one thousand, eight hundred thirty-eight".