168647428 has 12 divisors (see below), whose sum is σ = 295225420. Its totient is φ = 84297312.

The previous prime is 168647417. The next prime is 168647459. The reversal of 168647428 is 824746861.

It can be written as a sum of positive squares in 2 ways, for example, as 66879684 + 101767744 = 8178^2 + 10088^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17758 + ... + 25546.

Almost surely, 2^168647428 is an apocalyptic number.

It is an amenable number.

168647428 is a deficient number, since it is larger than the sum of its proper divisors (126577992).

168647428 is a wasteful number, since it uses less digits than its factorization.

168647428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13206 (or 13204 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 168647428 is about 12986.4324585315. The cubic root of 168647428 is about 552.4927381095.

The spelling of 168647428 in words is "one hundred sixty-eight million, six hundred forty-seven thousand, four hundred twenty-eight".