67971328 has 18 divisors (see below), whose sum is σ = 135677654. Its totient is φ = 33985536.

The previous prime is 67971311. The next prime is 67971349. The reversal of 67971328 is 82317976.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65804544 + 2166784 = 8112^2 + 1472^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132501 + ... + 133012.

Almost surely, 2^67971328 is an apocalyptic number.

It is an amenable number.

67971328 is a deficient number, since it is larger than the sum of its proper divisors (67706326).

67971328 is an equidigital number, since it uses as much as digits as its factorization.

67971328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265529 (or 265515 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 67971328 is about 8244.4725725786. The cubic root of 67971328 is about 408.1081348646.

The spelling of 67971328 in words is "sixty-seven million, nine hundred seventy-one thousand, three hundred twenty-eight".