42434856 has 96 divisors (see below), whose sum is σ = 125110440. Its totient is φ = 12939264.

The previous prime is 42434849. The next prime is 42434857. The reversal of 42434856 is 65843424.

It can be written as a sum of positive squares in 4 ways, for example, as 38862756 + 3572100 = 6234^2 + 1890^2 .

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 42434856.

It is not an unprimeable number, because it can be changed into a prime (42434857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44820 + ... + 45756.

Almost surely, 2^42434856 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 42434856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62555220).

42434856 is an abundant number, since it is smaller than the sum of its proper divisors (82675584).

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

42434856 is a wasteful number, since it uses less digits than its factorization.

42434856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003 (or 996 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 42434856 is about 6514.2041724220. The cubic root of 42434856 is about 348.7982073878.

The spelling of 42434856 in words is "forty-two million, four hundred thirty-four thousand, eight hundred fifty-six".