42688168 has 8 divisors (see below), whose sum is σ = 80040330. Its totient is φ = 21344080.

The previous prime is 42688159. The next prime is 42688189. The reversal of 42688168 is 86188624.

42688168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 42276004 + 412164 = 6502^2 + 642^2 .

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

It is a super-3 number, since 3×42688168³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2668003 + ... + 2668018.

Almost surely, 2^42688168 is an apocalyptic number.

It is an amenable number.

42688168 is a deficient number, since it is larger than the sum of its proper divisors (37352162).

42688168 is a wasteful number, since it uses less digits than its factorization.

42688168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336027 (or 5336023 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The square root of 42688168 is about 6533.6182931053. The cubic root of 42688168 is about 349.4908733647.

The spelling of 42688168 in words is "forty-two million, six hundred eighty-eight thousand, one hundred sixty-eight".