3820578525 has 36 divisors (see below), whose sum is σ = 6847065108. Its totient is φ = 2036455680.

The previous prime is 3820578499. The next prime is 3820578527. The reversal of 3820578525 is 5258750283.

3820578525 is a `hidden beast` number, since 3 + 8 + 20 + 578 + 52 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 282946041 + 3537632484 = 16821^2 + 59478^2 .

It is not a de Polignac number, because 3820578525 - 2⁵ = 3820578493 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3820578527) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 494089 + ... + 501761.

It is an arithmetic number, because the mean of its divisors is an integer number (190196253).

Almost surely, 2^3820578525 is an apocalyptic number.

It is an amenable number.

3820578525 is a deficient number, since it is larger than the sum of its proper divisors (3026486583).

3820578525 is a wasteful number, since it uses less digits than its factorization.

3820578525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9902 (or 9894 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The square root of 3820578525 is about 61810.8285416075. The cubic root of 3820578525 is about 1563.3025756344.

The spelling of 3820578525 in words is "three billion, eight hundred twenty million, five hundred seventy-eight thousand, five hundred twenty-five".