1998812160 has 352 divisors, whose sum is σ = 7487107200. Its totient is φ = 504299520.

The previous prime is 1998812159. The next prime is 1998812173. The reversal of 1998812160 is 612188991.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2626180 + ... + 2626940.

Almost surely, 2^1998812160 is an apocalyptic number.

1998812160 is a gapful number since it is divisible by the number (10) 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 1998812160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3743553600).

1998812160 is an abundant number, since it is smaller than the sum of its proper divisors (5488295040).

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

1998812160 is a wasteful number, since it uses less digits than its factorization.

1998812160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The square root of 1998812160 is about 44708.0771225961. The cubic root of 1998812160 is about 1259.6715697279.

The spelling of 1998812160 in words is "one billion, nine hundred ninety-eight million, eight hundred twelve thousand, one hundred sixty".