42378903 has 32 divisors (see below), whose sum is σ = 74880000. Its totient is φ = 23161248.

The previous prime is 42378899. The next prime is 42378929. The reversal of 42378903 is 30987324.

42378903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42378903 - 2² = 42378899 is a prime.

It is a super-3 number, since 3×42378903³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42378983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528 + ... + 9221.

It is an arithmetic number, because the mean of its divisors is an integer number (2340000).

Almost surely, 2^42378903 is an apocalyptic number.

42378903 is a deficient number, since it is larger than the sum of its proper divisors (32501097).

42378903 is a wasteful number, since it uses less digits than its factorization.

42378903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9788 (or 9782 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 42378903 is about 6509.9080638670. The cubic root of 42378903 is about 348.6448359062.

The spelling of 42378903 in words is "forty-two million, three hundred seventy-eight thousand, nine hundred three".