1998194832 has 140 divisors (see below), whose sum is σ = 5845766224. Its totient is φ = 661348800.

The previous prime is 1998194827. The next prime is 1998194839. The reversal of 1998194832 is 2384918991.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1998194839) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1900707 + ... + 1901757.

Almost surely, 2^1998194832 is an apocalyptic number.

1998194832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998194832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2922883112).

1998194832 is an abundant number, since it is smaller than the sum of its proper divisors (3847571392).

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

1998194832 is a wasteful number, since it uses less digits than its factorization.

1998194832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240 (or 1219 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 1998194832 is about 44701.1726020694. The cubic root of 1998194832 is about 1259.5418742657.

The spelling of 1998194832 in words is "one billion, nine hundred ninety-eight million, one hundred ninety-four thousand, eight hundred thirty-two".