67798728 has 32 divisors (see below), whose sum is σ = 188330400. Its totient is φ = 22599504.

The previous prime is 67798727. The next prime is 67798739. The reversal of 67798728 is 82789776.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (67798727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156726 + ... + 157157.

It is an arithmetic number, because the mean of its divisors is an integer number (5885325).

Almost surely, 2^67798728 is an apocalyptic number.

It is an amenable number.

67798728 is an abundant number, since it is smaller than the sum of its proper divisors (120531672).

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

67798728 is a wasteful number, since it uses less digits than its factorization.

67798728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313898 (or 313888 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 67798728 is about 8233.9982997326. The cubic root of 67798728 is about 407.7624049181.

The spelling of 67798728 in words is "sixty-seven million, seven hundred ninety-eight thousand, seven hundred twenty-eight".