42740660 has 12 divisors (see below), whose sum is σ = 89755428. Its totient is φ = 17096256.

The previous prime is 42740657. The next prime is 42740681. The reversal of 42740660 is 6604724.

It can be written as a sum of positive squares in 2 ways, for example, as 18079504 + 24661156 = 4252^2 + 4966^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068497 + ... + 1068536.

It is an arithmetic number, because the mean of its divisors is an integer number (7479619).

Almost surely, 2^42740660 is an apocalyptic number.

It is an amenable number.

42740660 is an abundant number, since it is smaller than the sum of its proper divisors (47014768).

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

42740660 is a wasteful number, since it uses less digits than its factorization.

42740660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137042 (or 2137040 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 42740660 is about 6537.6341286432. The cubic root of 42740660 is about 349.6340665206.

The spelling of 42740660 in words is "forty-two million, seven hundred forty thousand, six hundred sixty".