42503440 has 80 divisors (see below), whose sum is σ = 114635520. Its totient is φ = 14353920.

The previous prime is 42503413. The next prime is 42503441. The reversal of 42503440 is 4430524.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (42503441) 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, 39226 + ... + 40294.

It is an arithmetic number, because the mean of its divisors is an integer number (1432944).

Almost surely, 2^42503440 is an apocalyptic number.

42503440 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 42503440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57317760).

42503440 is an abundant number, since it is smaller than the sum of its proper divisors (72132080).

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

42503440 is a wasteful number, since it uses less digits than its factorization.

42503440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 42503440 is about 6519.4662358202. The cubic root of 42503440 is about 348.9860176170.

Adding to 42503440 its reverse (4430524), we get a palindrome (46933964).

The spelling of 42503440 in words is "forty-two million, five hundred three thousand, four hundred forty".