42500440 has 16 divisors (see below), whose sum is σ = 95626080. Its totient is φ = 17000160.

The previous prime is 42500431. The next prime is 42500441. The reversal of 42500440 is 4400524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42500441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531216 + ... + 531295.

It is an arithmetic number, because the mean of its divisors is an integer number (5976630).

Almost surely, 2^42500440 is an apocalyptic number.

42500440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42500440 is an abundant number, since it is smaller than the sum of its proper divisors (53125640).

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

42500440 is a wasteful number, since it uses less digits than its factorization.

42500440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062522 (or 1062518 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42500440 is about 6519.2361515748. The cubic root of 42500440 is about 348.9778066527.

Adding to 42500440 its reverse (4400524), we get a palindrome (46900964).

The spelling of 42500440 in words is "forty-two million, five hundred thousand, four hundred forty".