168304040 has 32 divisors (see below), whose sum is σ = 379368360. Its totient is φ = 67200000.

The previous prime is 168304013. The next prime is 168304061. The reversal of 168304040 is 40403861.

It can be written as a sum of positive squares in 4 ways, for example, as 152127556 + 16176484 = 12334^2 + 4022^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

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, 20540 + ... + 27540.

Almost surely, 2^168304040 is an apocalyptic number.

168304040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168304040 is an abundant number, since it is smaller than the sum of its proper divisors (211064320).

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

168304040 is a wasteful number, since it uses less digits than its factorization.

168304040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7613 (or 7609 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 168304040 is about 12973.2046927504. The cubic root of 168304040 is about 552.1175010664.

The spelling of 168304040 in words is "one hundred sixty-eight million, three hundred four thousand, forty".