3728319138 has 32 divisors (see below), whose sum is σ = 8302086720. Its totient is φ = 1240233120.

The previous prime is 3728319109. The next prime is 3728319139. The reversal of 3728319138 is 8319138273.

It is a happy number.

3728319138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3728319093 and 3728319102.

It is not an unprimeable number, because it can be changed into a prime (3728319139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43795 + ... + 96822.

It is an arithmetic number, because the mean of its divisors is an integer number (259440210).

Almost surely, 2^3728319138 is an apocalyptic number.

3728319138 is an abundant number, since it is smaller than the sum of its proper divisors (4573767582).

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

3728319138 is a wasteful number, since it uses less digits than its factorization.

3728319138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141119 (or 141113 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 3728319138 is about 61059.9634621574. The cubic root of 3728319138 is about 1550.6163539739.

The spelling of 3728319138 in words is "three billion, seven hundred twenty-eight million, three hundred nineteen thousand, one hundred thirty-eight".