820864324 has 24 divisors (see below), whose sum is σ = 1679910848. Its totient is φ = 343617120.

The previous prime is 820864313. The next prime is 820864327. The reversal of 820864324 is 423468028.

It is not an unprimeable number, because it can be changed into a prime (820864327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339687 + ... + 342094.

Almost surely, 2^820864324 is an apocalyptic number.

It is an amenable number.

820864324 is an abundant number, since it is smaller than the sum of its proper divisors (859046524).

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

820864324 is a wasteful number, since it uses less digits than its factorization.

820864324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681835 (or 681833 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 820864324 is about 28650.7299034423. The cubic root of 820864324 is about 936.3189081209.

The spelling of 820864324 in words is "eight hundred twenty million, eight hundred sixty-four thousand, three hundred twenty-four".