42443940 has 96 divisors (see below), whose sum is σ = 148184064. Its totient is φ = 8818560.

The previous prime is 42443939. The next prime is 42443953. The reversal of 42443940 is 4934424.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 42443898 and 42443907.

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 31 ways as a sum of consecutive naturals, for example, 27 + ... + 9213.

It is an arithmetic number, because the mean of its divisors is an integer number (1543584).

Almost surely, 2^42443940 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 42443940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74092032).

42443940 is an abundant number, since it is smaller than the sum of its proper divisors (105740124).

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

42443940 is a wasteful number, since it uses less digits than its factorization.

42443940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9217 (or 9215 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 42443940 is about 6514.9013806811. The cubic root of 42443940 is about 348.8230946082.

The spelling of 42443940 in words is "forty-two million, four hundred forty-three thousand, nine hundred forty".