385342784 has 28 divisors (see below), whose sum is σ = 765354324. Its totient is φ = 192497664.

The previous prime is 385342717. The next prime is 385342813. The reversal of 385342784 is 487243583.

It can be written as a sum of positive squares in 2 ways, for example, as 65934400 + 319408384 = 8120^2 + 17872^2 .

It is a super-2 number, since 2×385342784² = 296978122361741312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 97454 + ... + 101330.

It is an arithmetic number, because the mean of its divisors is an integer number (27334083).

Almost surely, 2^385342784 is an apocalyptic number.

It is an amenable number.

385342784 is a deficient number, since it is larger than the sum of its proper divisors (380011540).

385342784 is a wasteful number, since it uses less digits than its factorization.

385342784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5442 (or 5432 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The square root of 385342784 is about 19630.1498720718. The cubic root of 385342784 is about 727.6944738963.

The spelling of 385342784 in words is "three hundred eighty-five million, three hundred forty-two thousand, seven hundred eighty-four".