67728305232 has 240 divisors, whose sum is σ = 225620059392. Its totient is φ = 18562037760.

The previous prime is 67728305231. The next prime is 67728305233. The reversal of 67728305232 is 23250382776.

67728305232 is a `hidden beast` number, since 6 + 77 + 28 + 30 + 523 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (67728305231) and next prime (67728305233).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67728305231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2635228 + ... + 2660804.

Almost surely, 2^67728305232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67728305232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112810029696).

67728305232 is an abundant number, since it is smaller than the sum of its proper divisors (157891754160).

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

67728305232 is a wasteful number, since it uses less digits than its factorization.

67728305232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25706 (or 25697 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 67728305232 in words is "sixty-seven billion, seven hundred twenty-eight million, three hundred five thousand, two hundred thirty-two".