168689448 has 48 divisors (see below), whose sum is σ = 480916800. Its totient is φ = 53269920.

The previous prime is 168689441. The next prime is 168689483. The reversal of 168689448 is 844986861.

It is a super-2 number, since 2×168689448² = 56912259733089408, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 168689394 and 168689403.

It is not an unprimeable number, because it can be changed into a prime (168689441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60288 + ... + 63023.

It is an arithmetic number, because the mean of its divisors is an integer number (10019100).

Almost surely, 2^168689448 is an apocalyptic number.

168689448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

168689448 is an abundant number, since it is smaller than the sum of its proper divisors (312227352).

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

168689448 is a wasteful number, since it uses less digits than its factorization.

168689448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123342 (or 123335 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The square root of 168689448 is about 12988.0502000878. The cubic root of 168689448 is about 552.5386204516.

The spelling of 168689448 in words is "one hundred sixty-eight million, six hundred eighty-nine thousand, four hundred forty-eight".