4040287638 has 32 divisors (see below), whose sum is σ = 8199880800. Its totient is φ = 1326917376.

The previous prime is 4040287637. The next prime is 4040287673. The reversal of 4040287638 is 8367820404.

It is a self number, because there is not a number n which added to its sum of digits gives 4040287638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040287637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463908 + ... + 472536.

It is an arithmetic number, because the mean of its divisors is an integer number (256246275).

Almost surely, 2^4040287638 is an apocalyptic number.

4040287638 is an abundant number, since it is smaller than the sum of its proper divisors (4159593162).

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

4040287638 is a wasteful number, since it uses less digits than its factorization.

4040287638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9776.

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

The square root of 4040287638 is about 63563.2569807432. The cubic root of 4040287638 is about 1592.7126456298.

The spelling of 4040287638 in words is "four billion, forty million, two hundred eighty-seven thousand, six hundred thirty-eight".