387066728 has 8 divisors (see below), whose sum is σ = 725750130. Its totient is φ = 193533360.

The previous prime is 387066707. The next prime is 387066733. The reversal of 387066728 is 827660783.

It can be written as a sum of positive squares in only one way, i.e., 229764964 + 157301764 = 15158^2 + 12542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24191663 + ... + 24191678.

Almost surely, 2^387066728 is an apocalyptic number.

It is an amenable number.

387066728 is a deficient number, since it is larger than the sum of its proper divisors (338683402).

387066728 is a wasteful number, since it uses less digits than its factorization.

387066728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48383347 (or 48383343 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 387066728 is about 19674.0114872387. The cubic root of 387066728 is about 728.7780445180.

The spelling of 387066728 in words is "three hundred eighty-seven million, sixty-six thousand, seven hundred twenty-eight".