42432340 has 48 divisors (see below), whose sum is σ = 96928272. Its totient is φ = 15538176.

The previous prime is 42432337. The next prime is 42432347. The reversal of 42432340 is 4323424.

It can be written as a sum of positive squares in 8 ways, for example, as 15350724 + 27081616 = 3918^2 + 5204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42432347) 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, 10894 + ... + 14266.

It is an arithmetic number, because the mean of its divisors is an integer number (2019339).

Almost surely, 2^42432340 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 42432340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48464136).

42432340 is an abundant number, since it is smaller than the sum of its proper divisors (54495932).

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

42432340 is a wasteful number, since it uses less digits than its factorization.

42432340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436 (or 3434 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 42432340 is about 6514.0110531070. The cubic root of 42432340 is about 348.7913137338.

Adding to 42432340 its reverse (4323424), we get a palindrome (46755764).

The spelling of 42432340 in words is "forty-two million, four hundred thirty-two thousand, three hundred forty".