42397686 has 24 divisors (see below), whose sum is σ = 92186640. Its totient is φ = 14082576.

The previous prime is 42397669. The next prime is 42397769. The reversal of 42397686 is 68679324.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1255 + ... + 9293.

It is an arithmetic number, because the mean of its divisors is an integer number (3841110).

Almost surely, 2^42397686 is an apocalyptic number.

42397686 is an abundant number, since it is smaller than the sum of its proper divisors (49788954).

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

42397686 is a wasteful number, since it uses less digits than its factorization.

42397686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8340 (or 8337 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 42397686 is about 6511.3505511530. The cubic root of 42397686 is about 348.6963365999.

The spelling of 42397686 in words is "forty-two million, three hundred ninety-seven thousand, six hundred eighty-six".