168672736 has 48 divisors (see below), whose sum is σ = 344953728. Its totient is φ = 81100800.

The previous prime is 168672667. The next prime is 168672737. The reversal of 168672736 is 637276861.

168672736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168672737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191016 + ... + 191896.

It is an arithmetic number, because the mean of its divisors is an integer number (7186536).

Almost surely, 2^168672736 is an apocalyptic number.

168672736 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 168672736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172476864).

168672736 is an abundant number, since it is smaller than the sum of its proper divisors (176280992).

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

168672736 is a wasteful number, since it uses less digits than its factorization.

168672736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1107 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The square root of 168672736 is about 12987.4068235349. The cubic root of 168672736 is about 552.5203732515.

The spelling of 168672736 in words is "one hundred sixty-eight million, six hundred seventy-two thousand, seven hundred thirty-six".