820197652 has 48 divisors (see below), whose sum is σ = 1507297792. Its totient is φ = 390186720.

The previous prime is 820197629. The next prime is 820197667. The reversal of 820197652 is 256791028.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1186627 + ... + 1187317.

Almost surely, 2^820197652 is an apocalyptic number.

It is an amenable number.

820197652 is a deficient number, since it is larger than the sum of its proper divisors (687100140).

820197652 is a wasteful number, since it uses less digits than its factorization.

820197652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908 (or 906 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 820197652 is about 28639.0930722326. The cubic root of 820197652 is about 936.0653596578.

It can be divided in two parts, 8201976 and 52, that added together give a palindrome (8202028).

The spelling of 820197652 in words is "eight hundred twenty million, one hundred ninety-seven thousand, six hundred fifty-two".