42239664 has 40 divisors (see below), whose sum is σ = 121244720. Its totient is φ = 14079744.

The previous prime is 42239653. The next prime is 42239669. The reversal of 42239664 is 46693224.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (42239669) 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, 48457 + ... + 49320.

It is an arithmetic number, because the mean of its divisors is an integer number (3031118).

Almost surely, 2^42239664 is an apocalyptic number.

It is an amenable number.

42239664 is an abundant number, since it is smaller than the sum of its proper divisors (79005056).

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

42239664 is a wasteful number, since it uses less digits than its factorization.

42239664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97794 (or 97782 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 42239664 is about 6499.2048744443. The cubic root of 42239664 is about 348.2625842185.

The spelling of 42239664 in words is "forty-two million, two hundred thirty-nine thousand, six hundred sixty-four".