168538998 has 8 divisors (see below), whose sum is σ = 337078008. Its totient is φ = 56179664.

The previous prime is 168538943. The next prime is 168538999. The reversal of 168538998 is 899835861.

It is a sphenic number, since it is the product of 3 distinct primes.

168538998 is an admirable number.

It is a super-4 number, since 4×168538998⁴ (a number of 34 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168538999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14044911 + ... + 14044922.

It is an arithmetic number, because the mean of its divisors is an integer number (42134751).

Almost surely, 2^168538998 is an apocalyptic number.

168538998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

168538998 is a wasteful number, since it uses less digits than its factorization.

168538998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28089838.

The product of its digits is 3732480, while the sum is 57.

The square root of 168538998 is about 12982.2570456758. The cubic root of 168538998 is about 552.3743063577.

The spelling of 168538998 in words is "one hundred sixty-eight million, five hundred thirty-eight thousand, nine hundred ninety-eight".