820003722 has 32 divisors (see below), whose sum is σ = 1680645120. Its totient is φ = 266580720.

The previous prime is 820003711. The next prime is 820003741. The reversal of 820003722 is 227300028.

It is a super-2 number, since 2×820003722² = 1344812208187706568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 820003692 and 820003701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207279 + ... + 211197.

It is an arithmetic number, because the mean of its divisors is an integer number (52520160).

Almost surely, 2^820003722 is an apocalyptic number.

820003722 is an abundant number, since it is smaller than the sum of its proper divisors (860641398).

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

820003722 is a wasteful number, since it uses less digits than its factorization.

820003722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 820003722 is about 28635.7071154180. The cubic root of 820003722 is about 935.9915784727.

The spelling of 820003722 in words is "eight hundred twenty million, three thousand, seven hundred twenty-two".