821026632 has 96 divisors (see below), whose sum is σ = 2181941280. Its totient is φ = 257402880.

The previous prime is 821026631. The next prime is 821026663. The reversal of 821026632 is 236620128.

It is a self number, because there is not a number n which added to its sum of digits gives 821026632.

It is not an unprimeable number, because it can be changed into a prime (821026631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1671907 + ... + 1672397.

It is an arithmetic number, because the mean of its divisors is an integer number (22728555).

Almost surely, 2^821026632 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 821026632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1090970640).

821026632 is an abundant number, since it is smaller than the sum of its proper divisors (1360914648).

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

821026632 is a wasteful number, since it uses less digits than its factorization.

821026632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 821026632 is about 28653.5622916244. The cubic root of 821026632 is about 936.3806162618.

The spelling of 821026632 in words is "eight hundred twenty-one million, twenty-six thousand, six hundred thirty-two".