1898985489 has 16 divisors (see below), whose sum is σ = 2602321920. Its totient is φ = 1231298640.

The previous prime is 1898985463. The next prime is 1898985523. The reversal of 1898985489 is 9845898981.

It is not a de Polignac number, because 1898985489 - 2¹⁵ = 1898952721 is a prime.

It is a super-2 number, since 2×1898985489² = 7212291774865138242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1898985089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43917 + ... + 75674.

It is an arithmetic number, because the mean of its divisors is an integer number (162645120).

Almost surely, 2^1898985489 is an apocalyptic number.

It is an amenable number.

1898985489 is a deficient number, since it is larger than the sum of its proper divisors (703336431).

1898985489 is a wasteful number, since it uses less digits than its factorization.

1898985489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119740.

The product of its digits is 59719680, while the sum is 69.

The square root of 1898985489 is about 43577.3506422775. The cubic root of 1898985489 is about 1238.3418456271.

The spelling of 1898985489 in words is "one billion, eight hundred ninety-eight million, nine hundred eighty-five thousand, four hundred eighty-nine".