42235664 has 20 divisors (see below), whose sum is σ = 81934860. Its totient is φ = 21091200.

The previous prime is 42235663. The next prime is 42235679. The reversal of 42235664 is 46653224.

It can be written as a sum of positive squares in 2 ways, for example, as 20070400 + 22165264 = 4480^2 + 4708^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42235664.

It is not an unprimeable number, because it can be changed into a prime (42235663) 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, 19802 + ... + 21830.

It is an arithmetic number, because the mean of its divisors is an integer number (4096743).

Almost surely, 2^42235664 is an apocalyptic number.

It is an amenable number.

42235664 is a deficient number, since it is larger than the sum of its proper divisors (39699196).

42235664 is a wasteful number, since it uses less digits than its factorization.

42235664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338 (or 3332 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 42235664 is about 6498.8971372072. The cubic root of 42235664 is about 348.2515906469.

Adding to 42235664 its reverse (46653224), we get a palindrome (88888888).

The spelling of 42235664 in words is "forty-two million, two hundred thirty-five thousand, six hundred sixty-four".