387790669 has 16 divisors (see below), whose sum is σ = 455777280. Its totient is φ = 323015040.

The previous prime is 387790643. The next prime is 387790681. The reversal of 387790669 is 966097783.

It is a cyclic number.

It is not a de Polignac number, because 387790669 - 2¹⁹ = 387266381 is a prime.

It is a super-2 number, since 2×387790669² = 300763205926935122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387790619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74692 + ... + 79714.

It is an arithmetic number, because the mean of its divisors is an integer number (28486080).

Almost surely, 2^387790669 is an apocalyptic number.

It is an amenable number.

387790669 is a deficient number, since it is larger than the sum of its proper divisors (67986611).

387790669 is a wasteful number, since it uses less digits than its factorization.

387790669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340.

The product of its (nonzero) digits is 3429216, while the sum is 55.

The square root of 387790669 is about 19692.4013010095. The cubic root of 387790669 is about 729.2321124140.

The spelling of 387790669 in words is "three hundred eighty-seven million, seven hundred ninety thousand, six hundred sixty-nine".