42191856 has 120 divisors (see below), whose sum is σ = 142113920. Its totient is φ = 11415168.

The previous prime is 42191791. The next prime is 42191861. The reversal of 42191856 is 65819124.

42191856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 42191856.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 18051 + ... + 20253.

Almost surely, 2^42191856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42191856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71056960).

42191856 is an abundant number, since it is smaller than the sum of its proper divisors (99922064).

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

42191856 is a wasteful number, since it uses less digits than its factorization.

42191856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243 (or 2234 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 42191856 is about 6495.5258447642. The cubic root of 42191856 is about 348.1311435966.

The spelling of 42191856 in words is "forty-two million, one hundred ninety-one thousand, eight hundred fifty-six".