385515945 has 24 divisors (see below), whose sum is σ = 673115976. Its totient is φ = 204104448.

The previous prime is 385515943. The next prime is 385515967. The reversal of 385515945 is 549515583.

385515945 is a `hidden beast` number, since 3 + 8 + 5 + 51 + 594 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 89813529 + 295702416 = 9477^2 + 17196^2 .

It is not a de Polignac number, because 385515945 - 2¹ = 385515943 is a prime.

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 385515945.

It is not an unprimeable number, because it can be changed into a prime (385515943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25102 + ... + 37431.

It is an arithmetic number, because the mean of its divisors is an integer number (28046499).

Almost surely, 2^385515945 is an apocalyptic number.

It is an amenable number.

385515945 is a deficient number, since it is larger than the sum of its proper divisors (287600031).

385515945 is a wasteful number, since it uses less digits than its factorization.

385515945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62681 (or 62678 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The square root of 385515945 is about 19634.5599645116. The cubic root of 385515945 is about 727.8034586220.

The spelling of 385515945 in words is "three hundred eighty-five million, five hundred fifteen thousand, nine hundred forty-five".