168815385 has 48 divisors (see below), whose sum is σ = 298721280. Its totient is φ = 88179840.

The previous prime is 168815369. The next prime is 168815393. The reversal of 168815385 is 583518861.

It is not a de Polignac number, because 168815385 - 2⁴ = 168815369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 168815385.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 622800 + ... + 623070.

It is an arithmetic number, because the mean of its divisors is an integer number (6223360).

Almost surely, 2^168815385 is an apocalyptic number.

168815385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168815385 is a deficient number, since it is larger than the sum of its proper divisors (129905895).

168815385 is a wasteful number, since it uses less digits than its factorization.

168815385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 515 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 168815385 is about 12992.8974828558. The cubic root of 168815385 is about 552.6760875502.

The spelling of 168815385 in words is "one hundred sixty-eight million, eight hundred fifteen thousand, three hundred eighty-five".