168998670 has 128 divisors (see below), whose sum is σ = 474255360. Its totient is φ = 42768000.

The previous prime is 168998663. The next prime is 168998677. The reversal of 168998670 is 76899861.

It is an interprime number because it is at equal distance from previous prime (168998663) and next prime (168998677).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168998677) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 510405 + ... + 510735.

It is an arithmetic number, because the mean of its divisors is an integer number (3705120).

Almost surely, 2^168998670 is an apocalyptic number.

168998670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168998670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237127680).

168998670 is an abundant number, since it is smaller than the sum of its proper divisors (305256690).

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

168998670 is a wasteful number, since it uses less digits than its factorization.

168998670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 168998670 is about 12999.9488460532. The cubic root of 168998670 is about 552.8760310149.

The spelling of 168998670 in words is "one hundred sixty-eight million, nine hundred ninety-eight thousand, six hundred seventy".