42730664 has 16 divisors (see below), whose sum is σ = 80870400. Its totient is φ = 21165232.

The previous prime is 42730663. The next prime is 42730687. The reversal of 42730664 is 46603724.

It is a self number, because there is not a number n which added to its sum of digits gives 42730664.

It is not an unprimeable number, because it can be changed into a prime (42730663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24104 + ... + 25815.

It is an arithmetic number, because the mean of its divisors is an integer number (5054400).

Almost surely, 2^42730664 is an apocalyptic number.

It is an amenable number.

42730664 is a deficient number, since it is larger than the sum of its proper divisors (38139736).

42730664 is a wasteful number, since it uses less digits than its factorization.

42730664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50032 (or 50028 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 42730664 is about 6536.8695871954. The cubic root of 42730664 is about 349.6068074296.

The spelling of 42730664 in words is "forty-two million, seven hundred thirty thousand, six hundred sixty-four".