168078540 has 48 divisors (see below), whose sum is σ = 537852672. Its totient is φ = 38417856.

The previous prime is 168078539. The next prime is 168078563. The reversal of 168078540 is 45870861.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199674 + ... + 200513.

It is an arithmetic number, because the mean of its divisors is an integer number (11205264).

Almost surely, 2^168078540 is an apocalyptic number.

168078540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168078540 is an abundant number, since it is smaller than the sum of its proper divisors (369774132).

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

168078540 is a wasteful number, since it uses less digits than its factorization.

168078540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400206 (or 400204 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 168078540 is about 12964.5107890734. The cubic root of 168078540 is about 551.8708083503.

The spelling of 168078540 in words is "one hundred sixty-eight million, seventy-eight thousand, five hundred forty".