42539660 has 24 divisors (see below), whose sum is σ = 89676720. Its totient is φ = 16950464.

The previous prime is 42539617. The next prime is 42539663. The reversal of 42539660 is 6693524.

It is a self number, because there is not a number n which added to its sum of digits gives 42539660.

It is not an unprimeable number, because it can be changed into a prime (42539663) 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, 1427 + ... + 9333.

It is an arithmetic number, because the mean of its divisors is an integer number (3736530).

Almost surely, 2^42539660 is an apocalyptic number.

It is an amenable number.

42539660 is an abundant number, since it is smaller than the sum of its proper divisors (47137060).

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

42539660 is a wasteful number, since it uses less digits than its factorization.

42539660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8185 (or 8183 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 42539660 is about 6522.2434790492. The cubic root of 42539660 is about 349.0851208482.

The spelling of 42539660 in words is "forty-two million, five hundred thirty-nine thousand, six hundred sixty".