42378357 has 16 divisors (see below), whose sum is σ = 66323072. Its totient is φ = 23561280.

The previous prime is 42378353. The next prime is 42378359. The reversal of 42378357 is 75387324.

It is not a de Polignac number, because 42378357 - 2² = 42378353 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42378353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26494 + ... + 28047.

It is an arithmetic number, because the mean of its divisors is an integer number (4145192).

Almost surely, 2^42378357 is an apocalyptic number.

It is an amenable number.

42378357 is a deficient number, since it is larger than the sum of its proper divisors (23944715).

42378357 is a wasteful number, since it uses less digits than its factorization.

42378357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54588.

The product of its digits is 141120, while the sum is 39.

The square root of 42378357 is about 6509.8661276558. The cubic root of 42378357 is about 348.6433386132.

The spelling of 42378357 in words is "forty-two million, three hundred seventy-eight thousand, three hundred fifty-seven".