168404000 has 48 divisors (see below), whose sum is σ = 413778456. Its totient is φ = 67360000.

The previous prime is 168403967. The next prime is 168404021. The reversal of 168404000 is 404861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 73068304 + 95335696 = 8548^2 + 9764^2 .

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, 17051 + ... + 25050.

Almost surely, 2^168404000 is an apocalyptic number.

168404000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168404000 is an abundant number, since it is smaller than the sum of its proper divisors (245374456).

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

168404000 is an equidigital number, since it uses as much as digits as its factorization.

168404000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42126 (or 42108 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 168404000 is about 12977.0566770744. The cubic root of 168404000 is about 552.2267849213.

Adding to 168404000 its reverse (404861), we get a palindrome (168808861).

The spelling of 168404000 in words is "one hundred sixty-eight million, four hundred four thousand".