42438678 has 32 divisors (see below), whose sum is σ = 87749376. Its totient is φ = 13674528.

The previous prime is 42438677. The next prime is 42438689. The reversal of 42438678 is 87683424.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42438673) 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, 25776 + ... + 27372.

It is an arithmetic number, because the mean of its divisors is an integer number (2742168).

Almost surely, 2^42438678 is an apocalyptic number.

42438678 is an abundant number, since it is smaller than the sum of its proper divisors (45310698).

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

42438678 is a wasteful number, since it uses less digits than its factorization.

42438678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748.

The product of its digits is 258048, while the sum is 42.

The square root of 42438678 is about 6514.4975247520. The cubic root of 42438678 is about 348.8086788637.

It can be divided in two parts, 4243 and 8678, that added together give a palindrome (12921).

The spelling of 42438678 in words is "forty-two million, four hundred thirty-eight thousand, six hundred seventy-eight".