42639068 has 24 divisors (see below), whose sum is σ = 76112400. Its totient is φ = 20896128.

The previous prime is 42639049. The next prime is 42639071. The reversal of 42639068 is 86093624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104048 + ... + 104456.

It is an arithmetic number, because the mean of its divisors is an integer number (3171350).

Almost surely, 2^42639068 is an apocalyptic number.

It is an amenable number.

42639068 is a deficient number, since it is larger than the sum of its proper divisors (33473332).

42639068 is a wasteful number, since it uses less digits than its factorization.

42639068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 42639068 is about 6529.8597228424. The cubic root of 42639068 is about 349.3568269685.

It can be divided in two parts, 4263 and 9068, that added together give a palindrome (13331).

The spelling of 42639068 in words is "forty-two million, six hundred thirty-nine thousand, sixty-eight".