384378977 has 8 divisors (see below), whose sum is σ = 404397672. Its totient is φ = 364867200.

The previous prime is 384378961. The next prime is 384378979. The reversal of 384378977 is 779873483.

It can be written as a sum of positive squares in 4 ways, for example, as 15124321 + 369254656 = 3889^2 + 19216^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 384378977 - 2⁴ = 384378961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384378979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125174 + ... + 128207.

It is an arithmetic number, because the mean of its divisors is an integer number (50549709).

Almost surely, 2^384378977 is an apocalyptic number.

384378977 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

384378977 is a deficient number, since it is larger than the sum of its proper divisors (20018695).

384378977 is a wasteful number, since it uses less digits than its factorization.

384378977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253459.

The product of its digits is 7112448, while the sum is 56.

The square root of 384378977 is about 19605.5853521388. The cubic root of 384378977 is about 727.0872720248.

The spelling of 384378977 in words is "three hundred eighty-four million, three hundred seventy-eight thousand, nine hundred seventy-seven".