168104640 has 112 divisors (see below), whose sum is σ = 582289920. Its totient is φ = 40750080.

The previous prime is 168104627. The next prime is 168104681. The reversal of 168104640 is 46401861.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 168104598 and 168104607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2601 + ... + 18519.

Almost surely, 2^168104640 is an apocalyptic number.

168104640 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 168104640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291144960).

168104640 is an abundant number, since it is smaller than the sum of its proper divisors (414185280).

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

168104640 is a wasteful number, since it uses less digits than its factorization.

168104640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15950 (or 15940 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 168104640 is about 12965.5173440939. The cubic root of 168104640 is about 551.8993725414.

The spelling of 168104640 in words is "one hundred sixty-eight million, one hundred four thousand, six hundred forty".