869533812 has 96 divisors (see below), whose sum is σ = 2629088000. Its totient is φ = 248427648.

The previous prime is 869533801. The next prime is 869533817. The reversal of 869533812 is 218335968.

It is a happy number.

It is a super-2 number, since 2×869533812² = 1512178100422502688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869533817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25308 + ... + 48780.

Almost surely, 2^869533812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869533812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1314544000).

869533812 is an abundant number, since it is smaller than the sum of its proper divisors (1759554188).

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

869533812 is a wasteful number, since it uses less digits than its factorization.

869533812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23507 (or 23485 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 869533812 is about 29487.8587218536. The cubic root of 869533812 is about 954.4697263560.

The spelling of 869533812 in words is "eight hundred sixty-nine million, five hundred thirty-three thousand, eight hundred twelve".