42668536 has 16 divisors (see below), whose sum is σ = 81955440. Its totient is φ = 20813760.

The previous prime is 42668533. The next prime is 42668537. The reversal of 42668536 is 63586624.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42668531) 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, 64716 + ... + 65371.

It is an arithmetic number, because the mean of its divisors is an integer number (5122215).

Almost surely, 2^42668536 is an apocalyptic number.

It is an amenable number.

42668536 is a deficient number, since it is larger than the sum of its proper divisors (39286904).

42668536 is a wasteful number, since it uses less digits than its factorization.

42668536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130134 (or 130130 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 42668536 is about 6532.1157368804. The cubic root of 42668536 is about 349.4372889859.

The spelling of 42668536 in words is "forty-two million, six hundred sixty-eight thousand, five hundred thirty-six".