821076772 has 12 divisors (see below), whose sum is σ = 1437803136. Its totient is φ = 410275880.

The previous prime is 821076769. The next prime is 821076791. The reversal of 821076772 is 277670128.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58504 + ... + 71167.

It is an arithmetic number, because the mean of its divisors is an integer number (119816928).

Almost surely, 2^821076772 is an apocalyptic number.

It is an amenable number.

821076772 is a deficient number, since it is larger than the sum of its proper divisors (616726364).

821076772 is a wasteful number, since it uses less digits than its factorization.

821076772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131258 (or 131256 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 821076772 is about 28654.4372131089. The cubic root of 821076772 is about 936.3996774252.

The spelling of 821076772 in words is "eight hundred twenty-one million, seventy-six thousand, seven hundred seventy-two".