8520235812 has 54 divisors (see below), whose sum is σ = 23673201734. Its totient is φ = 2581888320.

The previous prime is 8520235783. The next prime is 8520235837. The reversal of 8520235812 is 2185320258.

8520235812 is a `hidden beast` number, since 8 + 52 + 0 + 23 + 581 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8104320576 + 415915236 = 90024^2 + 20394^2 .

It is a super-3 number, since 3×8520235812³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 973633 + ... + 982344.

Almost surely, 2^8520235812 is an apocalyptic number.

It is an amenable number.

8520235812 is an abundant number, since it is smaller than the sum of its proper divisors (15152965922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8520235812 is a wasteful number, since it uses less digits than its factorization.

8520235812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956009 (or 1955993 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 8520235812 is about 92305.1234331009. The cubic root of 8520235812 is about 2042.4457891385.

The spelling of 8520235812 in words is "eight billion, five hundred twenty million, two hundred thirty-five thousand, eight hundred twelve".