42043320 has 128 divisors (see below), whose sum is σ = 152928000. Its totient is φ = 10189440.

The previous prime is 42043319. The next prime is 42043321. The reversal of 42043320 is 2334024.

It is an interprime number because it is at equal distance from previous prime (42043319) and next prime (42043321).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 42043293 and 42043302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42043321) by changing a digit.

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, 10111 + ... + 13649.

It is an arithmetic number, because the mean of its divisors is an integer number (1194750).

Almost surely, 2^42043320 is an apocalyptic number.

42043320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42043320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76464000).

42043320 is an abundant number, since it is smaller than the sum of its proper divisors (110884680).

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

42043320 is a wasteful number, since it uses less digits than its factorization.

42043320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570 (or 3560 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 42043320 is about 6484.0820475993. The cubic root of 42043320 is about 347.7221325304.

Adding to 42043320 its reverse (2334024), we get a palindrome (44377344).

The spelling of 42043320 in words is "forty-two million, forty-three thousand, three hundred twenty".