821852604 has 72 divisors (see below), whose sum is σ = 2105223120. Its totient is φ = 270316800.

The previous prime is 821852587. The next prime is 821852623. The reversal of 821852604 is 406258128.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1079584 + ... + 1080344.

It is an arithmetic number, because the mean of its divisors is an integer number (29239210).

Almost surely, 2^821852604 is an apocalyptic number.

It is an amenable number.

821852604 is an abundant number, since it is smaller than the sum of its proper divisors (1283370516).

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

821852604 is a wasteful number, since it uses less digits than its factorization.

821852604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 821852604 is about 28667.9717454863. The cubic root of 821852604 is about 936.6945179568.

The spelling of 821852604 in words is "eight hundred twenty-one million, eight hundred fifty-two thousand, six hundred four".