168872724 has 36 divisors (see below), whose sum is σ = 428127700. Its totient is φ = 56125440.

The previous prime is 168872687. The next prime is 168872731. The reversal of 168872724 is 427278861.

It can be written as a sum of positive squares in 2 ways, for example, as 70862724 + 98010000 = 8418^2 + 9900^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×168872724² = 57035993822360352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168872724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5844 + ... + 19284.

Almost surely, 2^168872724 is an apocalyptic number.

It is an amenable number.

168872724 is an abundant number, since it is smaller than the sum of its proper divisors (259254976).

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

168872724 is a wasteful number, since it uses less digits than its factorization.

168872724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13800 (or 13795 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 168872724 is about 12995.1038472188. The cubic root of 168872724 is about 552.7386535440.

The spelling of 168872724 in words is "one hundred sixty-eight million, eight hundred seventy-two thousand, seven hundred twenty-four".