42057678 has 96 divisors (see below), whose sum is σ = 100137600. Its totient is φ = 11726208.

The previous prime is 42057671. The next prime is 42057679. The reversal of 42057678 is 87675024.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42057671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 712813 + ... + 712871.

It is an arithmetic number, because the mean of its divisors is an integer number (1043100).

Almost surely, 2^42057678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42057678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50068800).

42057678 is an abundant number, since it is smaller than the sum of its proper divisors (58079922).

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

42057678 is a wasteful number, since it uses less digits than its factorization.

42057678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 42057678 is about 6485.1891260009. The cubic root of 42057678 is about 347.7617109632.

The spelling of 42057678 in words is "forty-two million, fifty-seven thousand, six hundred seventy-eight".