389101728 has 24 divisors (see below), whose sum is σ = 1021392288. Its totient is φ = 129700544.

The previous prime is 389101717. The next prime is 389101747. The reversal of 389101728 is 827101983.

It is a tau number, because it is divible by the number of its divisors (24).

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, 2026476 + ... + 2026667.

It is an arithmetic number, because the mean of its divisors is an integer number (42558012).

Almost surely, 2^389101728 is an apocalyptic number.

It is an amenable number.

389101728 is an abundant number, since it is smaller than the sum of its proper divisors (632290560).

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

389101728 is a wasteful number, since it uses less digits than its factorization.

389101728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053156 (or 4053148 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 389101728 is about 19725.6616619063. The cubic root of 389101728 is about 730.0529942137.

The spelling of 389101728 in words is "three hundred eighty-nine million, one hundred one thousand, seven hundred twenty-eight".