821204496 has 60 divisors (see below), whose sum is σ = 2626554112. Its totient is φ = 234629568.

The previous prime is 821204473. The next prime is 821204537. The reversal of 821204496 is 694402128.

It is a super-2 number, since 2×821204496² = 1348753648501228032, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 821204496.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 406336 + ... + 408351.

Almost surely, 2^821204496 is an apocalyptic number.

It is an amenable number.

821204496 is an abundant number, since it is smaller than the sum of its proper divisors (1805349616).

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

821204496 is a wasteful number, since it uses less digits than its factorization.

821204496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814708 (or 814699 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 821204496 is about 28656.6658214106. The cubic root of 821204496 is about 936.4482293249.

The spelling of 821204496 in words is "eight hundred twenty-one million, two hundred four thousand, four hundred ninety-six".