42397924 has 24 divisors (see below), whose sum is σ = 78236928. Its totient is φ = 20064000.

The previous prime is 42397921. The next prime is 42397937. The reversal of 42397924 is 42979324.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (42397921) 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, 6549 + ... + 11299.

It is an arithmetic number, because the mean of its divisors is an integer number (3259872).

Almost surely, 2^42397924 is an apocalyptic number.

It is an amenable number.

42397924 is a deficient number, since it is larger than the sum of its proper divisors (35839004).

42397924 is a wasteful number, since it uses less digits than its factorization.

42397924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4875 (or 4873 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 42397924 is about 6511.3688269058. The cubic root of 42397924 is about 348.6969890692.

The spelling of 42397924 in words is "forty-two million, three hundred ninety-seven thousand, nine hundred twenty-four".