385355565 has 24 divisors (see below), whose sum is σ = 763371648. Its totient is φ = 176162400.

The previous prime is 385355533. The next prime is 385355591. The reversal of 385355565 is 565553583.

385355565 is a `hidden beast` number, since 3 + 8 + 535 + 55 + 65 = 666.

It is not a de Polignac number, because 385355565 - 2⁵ = 385355533 is a prime.

It is a super-2 number, since 2×385355565² = 296997822952938450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 385355565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 611361 + ... + 611990.

It is an arithmetic number, because the mean of its divisors is an integer number (31807152).

Almost surely, 2^385355565 is an apocalyptic number.

385355565 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

385355565 is a deficient number, since it is larger than the sum of its proper divisors (378016083).

385355565 is a wasteful number, since it uses less digits than its factorization.

385355565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223369 (or 1223366 counting only the distinct ones).

The product of its digits is 1350000, while the sum is 45.

The square root of 385355565 is about 19630.4754145181. The cubic root of 385355565 is about 727.7025191664.

It can be divided in two parts, 38535 and 5565, that added together give a square (44100 = 210²).

The spelling of 385355565 in words is "three hundred eighty-five million, three hundred fifty-five thousand, five hundred sixty-five".