67808928 has 96 divisors (see below), whose sum is σ = 195894720. Its totient is φ = 20367360.

The previous prime is 67808887. The next prime is 67808933. The reversal of 67808928 is 82980876.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165588 + ... + 165996.

It is an arithmetic number, because the mean of its divisors is an integer number (2040570).

Almost surely, 2^67808928 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 67808928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97947360).

67808928 is an abundant number, since it is smaller than the sum of its proper divisors (128085792).

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

67808928 is a wasteful number, since it uses less digits than its factorization.

67808928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 67808928 is about 8234.6176596124. The cubic root of 67808928 is about 407.7828525386.

The spelling of 67808928 in words is "sixty-seven million, eight hundred eight thousand, nine hundred twenty-eight".