1998168288 has 48 divisors (see below), whose sum is σ = 5521259520. Its totient is φ = 630999936.

The previous prime is 1998168241. The next prime is 1998168299. The reversal of 1998168288 is 8828618991.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545920 + ... + 549567.

It is an arithmetic number, because the mean of its divisors is an integer number (115026240).

Almost surely, 2^1998168288 is an apocalyptic number.

It is an amenable number.

1998168288 is an abundant number, since it is smaller than the sum of its proper divisors (3523091232).

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

1998168288 is a wasteful number, since it uses less digits than its factorization.

1998168288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095519 (or 1095511 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 60.

The square root of 1998168288 is about 44700.8756961203. The cubic root of 1998168288 is about 1259.5362969938.

The spelling of 1998168288 in words is "one billion, nine hundred ninety-eight million, one hundred sixty-eight thousand, two hundred eighty-eight".