387328993 has 16 divisors (see below), whose sum is σ = 417479040. Its totient is φ = 358452864.

The previous prime is 387328967. The next prime is 387329011. The reversal of 387328993 is 399823783.

It is a cyclic number.

It is not a de Polignac number, because 387328993 - 2⁹ = 387328481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 387328993.

It is not an unprimeable number, because it can be changed into a prime (387328393) 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, 106005 + ... + 109597.

It is an arithmetic number, because the mean of its divisors is an integer number (26092440).

Almost surely, 2^387328993 is an apocalyptic number.

It is an amenable number.

387328993 is a deficient number, since it is larger than the sum of its proper divisors (30150047).

387328993 is a wasteful number, since it uses less digits than its factorization.

387328993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768.

The product of its digits is 1959552, while the sum is 52.

The square root of 387328993 is about 19680.6756235654. The cubic root of 387328993 is about 728.9426068596.

The spelling of 387328993 in words is "three hundred eighty-seven million, three hundred twenty-eight thousand, nine hundred ninety-three".