4081900638 has 16 divisors (see below), whose sum is σ = 8168173200. Its totient is φ = 1359904896.

The previous prime is 4081900637. The next prime is 4081900649. The reversal of 4081900638 is 8360091804.

It is a junction number, because it is equal to n+sod(n) for n = 4081900596 and 4081900605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4081900637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169963 + ... + 192486.

It is an arithmetic number, because the mean of its divisors is an integer number (510510825).

Almost surely, 2^4081900638 is an apocalyptic number.

4081900638 is an abundant number, since it is smaller than the sum of its proper divisors (4086272562).

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

4081900638 is a wasteful number, since it uses less digits than its factorization.

4081900638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364331.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 4081900638 is about 63889.7537794598. The cubic root of 4081900638 is about 1598.1620350594.

The spelling of 4081900638 in words is "four billion, eighty-one million, nine hundred thousand, six hundred thirty-eight".