42578168 has 8 divisors (see below), whose sum is σ = 79834080. Its totient is φ = 21289080.

The previous prime is 42578167. The next prime is 42578197. The reversal of 42578168 is 86187524.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42578167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2661128 + ... + 2661143.

It is an arithmetic number, because the mean of its divisors is an integer number (9979260).

Almost surely, 2^42578168 is an apocalyptic number.

It is an amenable number.

42578168 is a deficient number, since it is larger than the sum of its proper divisors (37255912).

42578168 is a wasteful number, since it uses less digits than its factorization.

42578168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5322277 (or 5322273 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 42578168 is about 6525.1948629907. The cubic root of 42578168 is about 349.1904227060.

The spelling of 42578168 in words is "forty-two million, five hundred seventy-eight thousand, one hundred sixty-eight".