42478506 has 80 divisors (see below), whose sum is σ = 111234816. Its totient is φ = 11863584.

The previous prime is 42478483. The next prime is 42478507. The reversal of 42478506 is 60587424.

It is not an unprimeable number, because it can be changed into a prime (42478507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 52900 + ... + 53696.

Almost surely, 2^42478506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42478506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55617408).

42478506 is an abundant number, since it is smaller than the sum of its proper divisors (68756310).

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

42478506 is a wasteful number, since it uses less digits than its factorization.

42478506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 42478506 is about 6517.5536821725. The cubic root of 42478506 is about 348.9177618125.

The spelling of 42478506 in words is "forty-two million, four hundred seventy-eight thousand, five hundred six".