384778455 has 16 divisors (see below), whose sum is σ = 623064960. Its totient is φ = 202742048.

The previous prime is 384778453. The next prime is 384778483. The reversal of 384778455 is 554877483.

It is a cyclic number.

It is not a de Polignac number, because 384778455 - 2¹ = 384778453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 384778398 and 384778407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384778451) 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, 153285 + ... + 155774.

It is an arithmetic number, because the mean of its divisors is an integer number (38941560).

Almost surely, 2^384778455 is an apocalyptic number.

384778455 is a deficient number, since it is larger than the sum of its proper divisors (238286505).

384778455 is a wasteful number, since it uses less digits than its factorization.

384778455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309150.

The product of its digits is 3763200, while the sum is 51.

The square root of 384778455 is about 19615.7705686012. The cubic root of 384778455 is about 727.3390676250.

The spelling of 384778455 in words is "three hundred eighty-four million, seven hundred seventy-eight thousand, four hundred fifty-five".