4000578138 has 24 divisors (see below), whose sum is σ = 8684968500. Its totient is φ = 1330903104.

The previous prime is 4000578137. The next prime is 4000578161. The reversal of 4000578138 is 8318750004.

It can be written as a sum of positive squares in 2 ways, for example, as 3890391129 + 110187009 = 62373^2 + 10497^2 .

It is not an unprimeable number, because it can be changed into a prime (4000578133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209163 + ... + 227486.

Almost surely, 2^4000578138 is an apocalyptic number.

4000578138 is an abundant number, since it is smaller than the sum of its proper divisors (4684390362).

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

4000578138 is a wasteful number, since it uses less digits than its factorization.

4000578138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437166 (or 437163 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 4000578138 is about 63250.1236204326. The cubic root of 4000578138 is about 1587.4775263564.

The spelling of 4000578138 in words is "four billion, five hundred seventy-eight thousand, one hundred thirty-eight".