68578728 has 32 divisors (see below), whose sum is σ = 172404960. Its totient is φ = 22731840.

The previous prime is 68578711. The next prime is 68578729. The reversal of 68578728 is 82787586.

It is not an unprimeable number, because it can be changed into a prime (68578729) 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, 3550 + ... + 12237.

It is an arithmetic number, because the mean of its divisors is an integer number (5387655).

Almost surely, 2^68578728 is an apocalyptic number.

It is an amenable number.

68578728 is an abundant number, since it is smaller than the sum of its proper divisors (103826232).

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

68578728 is a wasteful number, since it uses less digits than its factorization.

68578728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15977 (or 15973 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 51.

The square root of 68578728 is about 8281.2274452523. The cubic root of 68578728 is about 409.3201662508.

The spelling of 68578728 in words is "sixty-eight million, five hundred seventy-eight thousand, seven hundred twenty-eight".