168015940 has 12 divisors (see below), whose sum is σ = 352833516. Its totient is φ = 67206368.

The previous prime is 168015923. The next prime is 168015961. The reversal of 168015940 is 49510861.

It can be written as a sum of positive squares in 2 ways, for example, as 36409156 + 131606784 = 6034^2 + 11472^2 .

It is a junction number, because it is equal to n+sod(n) for n = 168015896 and 168015905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4200379 + ... + 4200418.

It is an arithmetic number, because the mean of its divisors is an integer number (29402793).

Almost surely, 2^168015940 is an apocalyptic number.

168015940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168015940 is an abundant number, since it is smaller than the sum of its proper divisors (184817576).

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

168015940 is a wasteful number, since it uses less digits than its factorization.

168015940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400806 (or 8400804 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 168015940 is about 12962.0962810805. The cubic root of 168015940 is about 551.8022860145.

The spelling of 168015940 in words is "one hundred sixty-eight million, fifteen thousand, nine hundred forty".