168218736 has 80 divisors (see below), whose sum is σ = 508800768. Its totient is φ = 46886400.

The previous prime is 168218717. The next prime is 168218737. The reversal of 168218736 is 637812861.

It is a Harshad number since it is a multiple of its sum of digits (42).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168218737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7671 + ... + 19881.

Almost surely, 2^168218736 is an apocalyptic number.

168218736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168218736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254400384).

168218736 is an abundant number, since it is smaller than the sum of its proper divisors (340582032).

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

168218736 is a wasteful number, since it uses less digits than its factorization.

168218736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270 (or 12264 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 168218736 is about 12969.9165764472. The cubic root of 168218736 is about 552.0242060379.

The spelling of 168218736 in words is "one hundred sixty-eight million, two hundred eighteen thousand, seven hundred thirty-six".