3858123728 has 20 divisors (see below), whose sum is σ = 7477095840. Its totient is φ = 1928550624.

The previous prime is 3858123713. The next prime is 3858123751. The reversal of 3858123728 is 8273218583.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34493 + ... + 94371.

It is an arithmetic number, because the mean of its divisors is an integer number (373854792).

Almost surely, 2^3858123728 is an apocalyptic number.

It is an amenable number.

3858123728 is a deficient number, since it is larger than the sum of its proper divisors (3618972112).

3858123728 is a wasteful number, since it uses less digits than its factorization.

3858123728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63914 (or 63908 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 3858123728 is about 62113.7965994673. The cubic root of 3858123728 is about 1568.4068017285.

The spelling of 3858123728 in words is "three billion, eight hundred fifty-eight million, one hundred twenty-three thousand, seven hundred twenty-eight".