42438664 has 32 divisors (see below), whose sum is σ = 85148280. Its totient is φ = 19759104.

The previous prime is 42438653. The next prime is 42438673. The reversal of 42438664 is 46683424.

It can be written as a sum of positive squares in 4 ways, for example, as 42380100 + 58564 = 6510^2 + 242^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11584 + ... + 14800.

Almost surely, 2^42438664 is an apocalyptic number.

It is an amenable number.

42438664 is an abundant number, since it is smaller than the sum of its proper divisors (42709616).

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

42438664 is a wasteful number, since it uses less digits than its factorization.

42438664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337 (or 3333 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 42438664 is about 6514.4964502255. The cubic root of 42438664 is about 348.8086405078.

The spelling of 42438664 in words is "forty-two million, four hundred thirty-eight thousand, six hundred sixty-four".