42403340 has 48 divisors (see below), whose sum is σ = 102547200. Its totient is φ = 14427072.

The previous prime is 42403331. The next prime is 42403343. The reversal of 42403340 is 4330424.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (42403343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18371 + ... + 20549.

It is an arithmetic number, because the mean of its divisors is an integer number (2136400).

Almost surely, 2^42403340 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 42403340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51273600).

42403340 is an abundant number, since it is smaller than the sum of its proper divisors (60143860).

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

42403340 is a wasteful number, since it uses less digits than its factorization.

42403340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334 (or 2332 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 42403340 is about 6511.7847016006. The cubic root of 42403340 is about 348.7118361993.

Adding to 42403340 its reverse (4330424), we get a palindrome (46733764).

The spelling of 42403340 in words is "forty-two million, four hundred three thousand, three hundred forty".