42508840 has 64 divisors (see below), whose sum is σ = 110496960. Its totient is φ = 14545920.

The previous prime is 42508799. The next prime is 42508847. The reversal of 42508840 is 4880524.

It is not an unprimeable number, because it can be changed into a prime (42508847) 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, 4639 + ... + 10321.

It is an arithmetic number, because the mean of its divisors is an integer number (1726515).

Almost surely, 2^42508840 is an apocalyptic number.

42508840 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 42508840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55248480).

42508840 is an abundant number, since it is smaller than the sum of its proper divisors (67988120).

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

42508840 is a wasteful number, since it uses less digits than its factorization.

42508840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5722 (or 5718 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 42508840 is about 6519.8803670006. The cubic root of 42508840 is about 349.0007963792. Note that the first 3 decimals are identical.

The spelling of 42508840 in words is "forty-two million, five hundred eight thousand, eight hundred forty".