67728244 has 6 divisors (see below), whose sum is σ = 118524434. Its totient is φ = 33864120.

The previous prime is 67728233. The next prime is 67728247. The reversal of 67728244 is 44282776.

It can be written as a sum of positive squares in only one way, i.e., 39212644 + 28515600 = 6262^2 + 5340^2 .

It is a junction number, because it is equal to n+sod(n) for n = 67728197 and 67728206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67728247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8466027 + ... + 8466034.

Almost surely, 2^67728244 is an apocalyptic number.

It is an amenable number.

67728244 is a deficient number, since it is larger than the sum of its proper divisors (50796190).

67728244 is a wasteful number, since it uses less digits than its factorization.

67728244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16932065 (or 16932063 counting only the distinct ones).

The product of its digits is 150528, while the sum is 40.

The square root of 67728244 is about 8229.7171275810. The cubic root of 67728244 is about 407.6210517707.

The spelling of 67728244 in words is "sixty-seven million, seven hundred twenty-eight thousand, two hundred forty-four".