2068678638 has 36 divisors (see below), whose sum is σ = 4853445480. Its totient is φ = 636515568.

The previous prime is 2068678631. The next prime is 2068678681. The reversal of 2068678638 is 8368768602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2068678631) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 336978 + ... + 343061.

It is an arithmetic number, because the mean of its divisors is an integer number (134817930).

Almost surely, 2^2068678638 is an apocalyptic number.

2068678638 is an abundant number, since it is smaller than the sum of its proper divisors (2784766842).

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

2068678638 is a wasteful number, since it uses less digits than its factorization.

2068678638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680073 (or 680057 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The square root of 2068678638 is about 45482.7290078333. The cubic root of 2068678638 is about 1274.1806629814.

The spelling of 2068678638 in words is "two billion, sixty-eight million, six hundred seventy-eight thousand, six hundred thirty-eight".