42840448 has 64 divisors (see below), whose sum is σ = 98532000. Its totient is φ = 18173952.

The previous prime is 42840443. The next prime is 42840491. The reversal of 42840448 is 84404824.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42840443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122578 + ... + 122926.

Almost surely, 2^42840448 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 42840448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49266000).

42840448 is an abundant number, since it is smaller than the sum of its proper divisors (55691552).

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

42840448 is a wasteful number, since it uses less digits than its factorization.

42840448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 34.

The square root of 42840448 is about 6545.2614921025. The cubic root of 42840448 is about 349.9059556851.

The spelling of 42840448 in words is "forty-two million, eight hundred forty thousand, four hundred forty-eight".