168444028 has 6 divisors (see below), whose sum is σ = 294777056. Its totient is φ = 84222012.

The previous prime is 168444013. The next prime is 168444061. The reversal of 168444028 is 820444861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21055500 + ... + 21055507.

Almost surely, 2^168444028 is an apocalyptic number.

It is an amenable number.

168444028 is a deficient number, since it is larger than the sum of its proper divisors (126333028).

168444028 is a wasteful number, since it uses less digits than its factorization.

168444028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42111011 (or 42111009 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 168444028 is about 12978.5988457923. The cubic root of 168444028 is about 552.2705344415.

Adding to 168444028 its reverse (820444861), we get a palindrome (988888889).

The spelling of 168444028 in words is "one hundred sixty-eight million, four hundred forty-four thousand, twenty-eight".