821627916 has 24 divisors (see below), whose sum is σ = 1920307200. Its totient is φ = 273422352.

The previous prime is 821627909. The next prime is 821627953. The reversal of 821627916 is 619726128.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49116 + ... + 63683.

It is an arithmetic number, because the mean of its divisors is an integer number (80012800).

Almost surely, 2^821627916 is an apocalyptic number.

It is an amenable number.

821627916 is an abundant number, since it is smaller than the sum of its proper divisors (1098679284).

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

821627916 is a wasteful number, since it uses less digits than its factorization.

821627916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113413 (or 113411 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 821627916 is about 28664.0526792706. The cubic root of 821627916 is about 936.6091485530.

The spelling of 821627916 in words is "eight hundred twenty-one million, six hundred twenty-seven thousand, nine hundred sixteen".