821536092 has 72 divisors (see below), whose sum is σ = 2239844880. Its totient is φ = 252391680.

The previous prime is 821536081. The next prime is 821536097. The reversal of 821536092 is 290635128.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821536097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 509784 + ... + 511392.

Almost surely, 2^821536092 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 821536092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119922440).

821536092 is an abundant number, since it is smaller than the sum of its proper divisors (1418308788).

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

821536092 is a wasteful number, since it uses less digits than its factorization.

821536092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723 (or 2718 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 821536092 is about 28662.4509070665. The cubic root of 821536092 is about 936.5742558719.

The spelling of 821536092 in words is "eight hundred twenty-one million, five hundred thirty-six thousand, ninety-two".