384723765 has 12 divisors (see below), whose sum is σ = 666854604. Its totient is φ = 205185984.

The previous prime is 384723749. The next prime is 384723769. The reversal of 384723765 is 567327483.

It can be written as a sum of positive squares in 2 ways, for example, as 237683889 + 147039876 = 15417^2 + 12126^2 .

It is not a de Polignac number, because 384723765 - 2⁴ = 384723749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 8549417 = 384723765 / (3 + 8 + 4 + 7 + 2 + 3 + 7 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 384723765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384723769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4274664 + ... + 4274753.

It is an arithmetic number, because the mean of its divisors is an integer number (55571217).

Almost surely, 2^384723765 is an apocalyptic number.

It is an amenable number.

384723765 is a deficient number, since it is larger than the sum of its proper divisors (282130839).

384723765 is a wasteful number, since it uses less digits than its factorization.

384723765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8549428 (or 8549425 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 384723765 is about 19614.3764876684. The cubic root of 384723765 is about 727.3046061855.

The spelling of 384723765 in words is "three hundred eighty-four million, seven hundred twenty-three thousand, seven hundred sixty-five".