821067604 has 24 divisors (see below), whose sum is σ = 1698762240. Its totient is φ = 339751776.

The previous prime is 821067601. The next prime is 821067607. The reversal of 821067604 is 406760128.

It is an interprime number because it is at equal distance from previous prime (821067601) and next prime (821067607).

It is a self number, because there is not a number n which added to its sum of digits gives 821067604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821067601) 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, 504772 + ... + 506395.

It is an arithmetic number, because the mean of its divisors is an integer number (70781760).

Almost surely, 2^821067604 is an apocalyptic number.

It is an amenable number.

821067604 is an abundant number, since it is smaller than the sum of its proper divisors (877694636).

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

821067604 is a wasteful number, since it uses less digits than its factorization.

821067604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011207 (or 1011205 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 821067604 is about 28654.2772374387. The cubic root of 821067604 is about 936.3961921871.

The spelling of 821067604 in words is "eight hundred twenty-one million, sixty-seven thousand, six hundred four".