42881790 has 64 divisors (see below), whose sum is σ = 119646720. Its totient is φ = 9632640.

The previous prime is 42881771. The next prime is 42881801. The reversal of 42881790 is 9718824.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10660 + ... + 14120.

It is an arithmetic number, because the mean of its divisors is an integer number (1869480).

Almost surely, 2^42881790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42881790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59823360).

42881790 is an abundant number, since it is smaller than the sum of its proper divisors (76764930).

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

42881790 is a wasteful number, since it uses less digits than its factorization.

42881790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3537.

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

The square root of 42881790 is about 6548.4188931375. The cubic root of 42881790 is about 350.0184752152.

The spelling of 42881790 in words is "forty-two million, eight hundred eighty-one thousand, seven hundred ninety".