168628072 has 8 divisors (see below), whose sum is σ = 316177650. Its totient is φ = 84314032.

The previous prime is 168628051. The next prime is 168628073. The reversal of 168628072 is 270826861.

It can be written as a sum of positive squares in only one way, i.e., 149670756 + 18957316 = 12234^2 + 4354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (168628073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10539247 + ... + 10539262.

Almost surely, 2^168628072 is an apocalyptic number.

It is an amenable number.

168628072 is a deficient number, since it is larger than the sum of its proper divisors (147549578).

168628072 is a wasteful number, since it uses less digits than its factorization.

168628072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21078515 (or 21078511 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 168628072 is about 12985.6871978344. The cubic root of 168628072 is about 552.4716004048.

The spelling of 168628072 in words is "one hundred sixty-eight million, six hundred twenty-eight thousand, seventy-two".