384015399 has 4 divisors (see below), whose sum is σ = 512020536. Its totient is φ = 256010264.

The previous prime is 384015371. The next prime is 384015407. The reversal of 384015399 is 993510483.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 384015399 - 2²¹ = 381918247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 384015399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384011399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64002564 + ... + 64002569.

It is an arithmetic number, because the mean of its divisors is an integer number (128005134).

Almost surely, 2^384015399 is an apocalyptic number.

384015399 is a deficient number, since it is larger than the sum of its proper divisors (128005137).

384015399 is a wasteful number, since it uses less digits than its factorization.

384015399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128005136.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 384015399 is about 19596.3108517904. The cubic root of 384015399 is about 726.8579529197.

The spelling of 384015399 in words is "three hundred eighty-four million, fifteen thousand, three hundred ninety-nine".