42881670 has 128 divisors (see below), whose sum is σ = 129830400. Its totient is φ = 9984384.

The previous prime is 42881659. The next prime is 42881687. The reversal of 42881670 is 7618824.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 66369 + ... + 67011.

It is an arithmetic number, because the mean of its divisors is an integer number (1014300).

Almost surely, 2^42881670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42881670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64915200).

42881670 is an abundant number, since it is smaller than the sum of its proper divisors (86948730).

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

42881670 is a wasteful number, since it uses less digits than its factorization.

42881670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 42881670 is about 6548.4097306140. The cubic root of 42881670 is about 350.0181487188.

The spelling of 42881670 in words is "forty-two million, eight hundred eighty-one thousand, six hundred seventy".