42815340 has 72 divisors (see below), whose sum is σ = 134080128. Its totient is φ = 11047680.

The previous prime is 42815317. The next prime is 42815359. The reversal of 42815340 is 4351824.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1744 + ... + 9416.

It is an arithmetic number, because the mean of its divisors is an integer number (1862224).

Almost surely, 2^42815340 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 42815340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67040064).

42815340 is an abundant number, since it is smaller than the sum of its proper divisors (91264788).

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

42815340 is a wasteful number, since it uses less digits than its factorization.

42815340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7719 (or 7714 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 42815340 is about 6543.3431821967. The cubic root of 42815340 is about 349.8375845076.

The spelling of 42815340 in words is "forty-two million, eight hundred fifteen thousand, three hundred forty".