168679728 has 60 divisors (see below), whose sum is σ = 539510608. Its totient is φ = 48193920.

The previous prime is 168679717. The next prime is 168679751. The reversal of 168679728 is 827976861.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82663 + ... + 84678.

Almost surely, 2^168679728 is an apocalyptic number.

168679728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

168679728 is an abundant number, since it is smaller than the sum of its proper divisors (370830880).

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

168679728 is a wasteful number, since it uses less digits than its factorization.

168679728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167362 (or 167353 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 168679728 is about 12987.6760045822. The cubic root of 168679728 is about 552.5280076982.

The spelling of 168679728 in words is "one hundred sixty-eight million, six hundred seventy-nine thousand, seven hundred twenty-eight".