67728252 has 12 divisors (see below), whose sum is σ = 158032616. Its totient is φ = 22576080.

The previous prime is 67728251. The next prime is 67728259. The reversal of 67728252 is 25282776.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×67728252² = 9174232237951008, 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 67728252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67728251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2821999 + ... + 2822022.

Almost surely, 2^67728252 is an apocalyptic number.

It is an amenable number.

67728252 is an abundant number, since it is smaller than the sum of its proper divisors (90304364).

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

67728252 is a wasteful number, since it uses less digits than its factorization.

67728252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644028 (or 5644026 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 67728252 is about 8229.7176136244. The cubic root of 67728252 is about 407.6210678200.

The spelling of 67728252 in words is "sixty-seven million, seven hundred twenty-eight thousand, two hundred fifty-two".