42630856 has 8 divisors (see below), whose sum is σ = 79932870. Its totient is φ = 21315424.

The previous prime is 42630853. The next prime is 42630871. The reversal of 42630856 is 65803624.

It is a happy number.

42630856 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., 41344900 + 1285956 = 6430^2 + 1134^2 .

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 (42630853) by changing a digit.

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, 2664421 + ... + 2664436.

Almost surely, 2^42630856 is an apocalyptic number.

It is an amenable number.

42630856 is a deficient number, since it is larger than the sum of its proper divisors (37302014).

42630856 is a wasteful number, since it uses less digits than its factorization.

42630856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328863 (or 5328859 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 42630856 is about 6529.2308888567. The cubic root of 42630856 is about 349.3343975973.

The spelling of 42630856 in words is "forty-two million, six hundred thirty thousand, eight hundred fifty-six".