42508660 has 24 divisors (see below), whose sum is σ = 89729640. Its totient is φ = 16915584.

The previous prime is 42508651. The next prime is 42508663. The reversal of 42508660 is 6680524.

It can be written as a sum of positive squares in 4 ways, for example, as 14333796 + 28174864 = 3786^2 + 5308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42508663) 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, 1455 + ... + 9334.

It is an arithmetic number, because the mean of its divisors is an integer number (3738735).

Almost surely, 2^42508660 is an apocalyptic number.

It is an amenable number.

42508660 is an abundant number, since it is smaller than the sum of its proper divisors (47220980).

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

42508660 is a wasteful number, since it uses less digits than its factorization.

42508660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10995 (or 10993 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 42508660 is about 6519.8665630517. The cubic root of 42508660 is about 349.0003037739. Note that the first 3 decimals are identical.

The spelling of 42508660 in words is "forty-two million, five hundred eight thousand, six hundred sixty".