1998444030 has 32 divisors (see below), whose sum is σ = 5232290688. Its totient is φ = 484471200.

The previous prime is 1998444013. The next prime is 1998444031. The reversal of 1998444030 is 304448991.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998444031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3027616 + ... + 3028275.

It is an arithmetic number, because the mean of its divisors is an integer number (163509084).

Almost surely, 2^1998444030 is an apocalyptic number.

1998444030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1998444030 is an abundant number, since it is smaller than the sum of its proper divisors (3233846658).

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

1998444030 is a wasteful number, since it uses less digits than its factorization.

1998444030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055912.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1998444030 is about 44703.9598917143. The cubic root of 1998444030 is about 1259.5942319010.

The spelling of 1998444030 in words is "one billion, nine hundred ninety-eight million, four hundred forty-four thousand, thirty".