67648428 has 36 divisors (see below), whose sum is σ = 178437168. Its totient is φ = 21568800.

The previous prime is 67648393. The next prime is 67648429. The reversal of 67648428 is 82484676.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (67648429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40023 + ... + 41678.

It is an arithmetic number, because the mean of its divisors is an integer number (4956588).

Almost surely, 2^67648428 is an apocalyptic number.

It is an amenable number.

67648428 is an abundant number, since it is smaller than the sum of its proper divisors (110788740).

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

67648428 is a wasteful number, since it uses less digits than its factorization.

67648428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81734 (or 81729 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 67648428 is about 8224.8664426846. The cubic root of 67648428 is about 407.4608651742.

The spelling of 67648428 in words is "sixty-seven million, six hundred forty-eight thousand, four hundred twenty-eight".