42408393 has 4 divisors (see below), whose sum is σ = 56544528. Its totient is φ = 28272260.

The previous prime is 42408349. The next prime is 42408407. The reversal of 42408393 is 39380424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42408393 - 2⁸ = 42408137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42408313) 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, 7068063 + ... + 7068068.

It is an arithmetic number, because the mean of its divisors is an integer number (14136132).

Almost surely, 2^42408393 is an apocalyptic number.

It is an amenable number.

42408393 is a deficient number, since it is larger than the sum of its proper divisors (14136135).

42408393 is a wasteful number, since it uses less digits than its factorization.

42408393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14136134.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 42408393 is about 6512.1726789145. The cubic root of 42408393 is about 348.7256870809.

The spelling of 42408393 in words is "forty-two million, four hundred eight thousand, three hundred ninety-three".