42985878 has 32 divisors (see below), whose sum is σ = 93423456. Its totient is φ = 13106688.

The previous prime is 42985867. The next prime is 42985879. The reversal of 42985878 is 87858924.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42985878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42985879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6376 + ... + 11252.

It is an arithmetic number, because the mean of its divisors is an integer number (2919483).

Almost surely, 2^42985878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42985878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46711728).

42985878 is an abundant number, since it is smaller than the sum of its proper divisors (50437578).

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

42985878 is a wasteful number, since it uses less digits than its factorization.

42985878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008.

The product of its digits is 1290240, while the sum is 51.

The square root of 42985878 is about 6556.3616434727. The cubic root of 42985878 is about 350.3014491359.

The spelling of 42985878 in words is "forty-two million, nine hundred eighty-five thousand, eight hundred seventy-eight".