42978180 has 48 divisors (see below), whose sum is σ = 137531520. Its totient is φ = 9823488.

The previous prime is 42978167. The next prime is 42978181. The reversal of 42978180 is 8187924.

42978180 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42978180² = 3694247912224800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42978181) 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 in 15 ways as a sum of consecutive naturals, for example, 50745 + ... + 51584.

It is an arithmetic number, because the mean of its divisors is an integer number (2865240).

Almost surely, 2^42978180 is an apocalyptic number.

It is an amenable number.

42978180 is an abundant number, since it is smaller than the sum of its proper divisors (94553340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42978180 is a wasteful number, since it uses less digits than its factorization.

42978180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102348 (or 102346 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 42978180 is about 6555.7745537808. The cubic root of 42978180 is about 350.2805369847.

The spelling of 42978180 in words is "forty-two million, nine hundred seventy-eight thousand, one hundred eighty".