168797538 has 72 divisors (see below), whose sum is σ = 452657088. Its totient is φ = 44512416.

The previous prime is 168797513. The next prime is 168797567. The reversal of 168797538 is 835797861.

168797538 is a `hidden beast` number, since 16 + 8 + 7 + 97 + 538 = 666.

It is a super-2 number, since 2×168797538² = 56985217669722888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17331 + ... + 25257.

It is an arithmetic number, because the mean of its divisors is an integer number (6286904).

Almost surely, 2^168797538 is an apocalyptic number.

168797538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168797538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226328544).

168797538 is an abundant number, since it is smaller than the sum of its proper divisors (283859550).

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

168797538 is a wasteful number, since it uses less digits than its factorization.

168797538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7968 (or 7952 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 168797538 is about 12992.2106663955. The cubic root of 168797538 is about 552.6566107358.

It can be divided in two parts, 1687 and 97538, that added together give a square (99225 = 315²).

The spelling of 168797538 in words is "one hundred sixty-eight million, seven hundred ninety-seven thousand, five hundred thirty-eight".