820821032 has 16 divisors (see below), whose sum is σ = 1548257760. Its totient is φ = 407952304.

The previous prime is 820821031. The next prime is 820821037. The reversal of 820821032 is 230128028.

It is a junction number, because it is equal to n+sod(n) for n = 820820992 and 820821010.

It is not an unprimeable number, because it can be changed into a prime (820821031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305858 + ... + 308529.

It is an arithmetic number, because the mean of its divisors is an integer number (96766110).

Almost surely, 2^820821032 is an apocalyptic number.

It is an amenable number.

820821032 is a deficient number, since it is larger than the sum of its proper divisors (727436728).

820821032 is a wasteful number, since it uses less digits than its factorization.

820821032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614560 (or 614556 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 820821032 is about 28649.9743804423. The cubic root of 820821032 is about 936.3024474913.

The spelling of 820821032 in words is "eight hundred twenty million, eight hundred twenty-one thousand, thirty-two".