42340440 has 32 divisors (see below), whose sum is σ = 127021680. Its totient is φ = 11290752.

The previous prime is 42340439. The next prime is 42340453. The reversal of 42340440 is 4404324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176299 + ... + 176538.

Almost surely, 2^42340440 is an apocalyptic number.

42340440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42340440 is an abundant number, since it is smaller than the sum of its proper divisors (84681240).

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

42340440 is a wasteful number, since it uses less digits than its factorization.

42340440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352851 (or 352847 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 42340440 is about 6506.9532040733. The cubic root of 42340440 is about 348.5393275489.

Adding to 42340440 its reverse (4404324), we get a palindrome (46744764).

The spelling of 42340440 in words is "forty-two million, three hundred forty thousand, four hundred forty".