821376324 has 36 divisors (see below), whose sum is σ = 2120436864. Its totient is φ = 267966192.

The previous prime is 821376323. The next prime is 821376359. The reversal of 821376324 is 423673128.

It is a happy number.

821376324 is a `hidden beast` number, since 8 + 2 + 13 + 7 + 632 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (821376323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241032 + ... + 244415.

It is an arithmetic number, because the mean of its divisors is an integer number (58901024).

Almost surely, 2^821376324 is an apocalyptic number.

It is an amenable number.

821376324 is an abundant number, since it is smaller than the sum of its proper divisors (1299060540).

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

821376324 is a wasteful number, since it uses less digits than its factorization.

821376324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485504 (or 485499 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 821376324 is about 28659.6637105183. The cubic root of 821376324 is about 936.5135385976.

The spelling of 821376324 in words is "eight hundred twenty-one million, three hundred seventy-six thousand, three hundred twenty-four".