7820497900 has 18 divisors (see below), whose sum is σ = 16970480660. Its totient is φ = 3128199120.

The previous prime is 7820497871. The next prime is 7820497903. The reversal of 7820497900 is 97940287.

It is a super-2 number, since 2×7820497900² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7820497903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39102390 + ... + 39102589.

Almost surely, 2^7820497900 is an apocalyptic number.

It is an amenable number.

7820497900 is an abundant number, since it is smaller than the sum of its proper divisors (9149982760).

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

7820497900 is a wasteful number, since it uses less digits than its factorization.

7820497900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78204993 (or 78204986 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 7820497900 is about 88433.5790296876. The cubic root of 7820497900 is about 1984.9281973575.

The spelling of 7820497900 in words is "seven billion, eight hundred twenty million, four hundred ninety-seven thousand, nine hundred".