42342440 has 64 divisors (see below), whose sum is σ = 110073600. Its totient is φ = 14358528.

The previous prime is 42342439. The next prime is 42342449. The reversal of 42342440 is 4424324.

It is not an unprimeable number, because it can be changed into a prime (42342449) 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, 26381 + ... + 27939.

It is an arithmetic number, because the mean of its divisors is an integer number (1719900).

Almost surely, 2^42342440 is an apocalyptic number.

42342440 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 42342440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55036800).

42342440 is an abundant number, since it is smaller than the sum of its proper divisors (67731160).

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

42342440 is a wasteful number, since it uses less digits than its factorization.

42342440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 42342440 is about 6507.1068840154. The cubic root of 42342440 is about 348.5448153495.

Adding to 42342440 its reverse (4424324), we get a palindrome (46766764).

The spelling of 42342440 in words is "forty-two million, three hundred forty-two thousand, four hundred forty".