9780528465 has 20 divisors (see below), whose sum is σ = 17532503604. Its totient is φ = 5216281632.

The previous prime is 9780528463. The next prime is 9780528509. The reversal of 9780528465 is 5648250879.

9780528465 is a `hidden beast` number, since 9 + 78 + 0 + 528 + 46 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2958924816 + 6821603649 = 54396^2 + 82593^2 .

It is not a de Polignac number, because 9780528465 - 2¹ = 9780528463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9780528463) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12074322 + ... + 12075131.

Almost surely, 2^9780528465 is an apocalyptic number.

It is an amenable number.

9780528465 is a deficient number, since it is larger than the sum of its proper divisors (7751975139).

9780528465 is a wasteful number, since it uses less digits than its factorization.

9780528465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24149470 (or 24149461 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The square root of 9780528465 is about 98896.5543636380. The cubic root of 9780528465 is about 2138.5567221897.

The spelling of 9780528465 in words is "nine billion, seven hundred eighty million, five hundred twenty-eight thousand, four hundred sixty-five".