386969728 has 64 divisors (see below), whose sum is σ = 795453120. Its totient is φ = 187407360.

The previous prime is 386969711. The next prime is 386969747. The reversal of 386969728 is 827969683.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 918958 + ... + 919378.

It is an arithmetic number, because the mean of its divisors is an integer number (12428955).

Almost surely, 2^386969728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 386969728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397726560).

386969728 is an abundant number, since it is smaller than the sum of its proper divisors (408483392).

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

386969728 is a wasteful number, since it uses less digits than its factorization.

386969728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 633 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 58.

The square root of 386969728 is about 19671.5461517391. The cubic root of 386969728 is about 728.7171614960.

The spelling of 386969728 in words is "three hundred eighty-six million, nine hundred sixty-nine thousand, seven hundred twenty-eight".