8397806420 has 24 divisors (see below), whose sum is σ = 17774260224. Its totient is φ = 3332671776.

The previous prime is 8397806419. The next prime is 8397806479. The reversal of 8397806420 is 246087938.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1650572 + ... + 1655651.

It is an arithmetic number, because the mean of its divisors is an integer number (740594176).

Almost surely, 2^8397806420 is an apocalyptic number.

It is an amenable number.

8397806420 is an abundant number, since it is smaller than the sum of its proper divisors (9376453804).

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

8397806420 is a wasteful number, since it uses less digits than its factorization.

8397806420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306359 (or 3306357 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 8397806420 is about 91639.5461577588. The cubic root of 8397806420 is about 2032.6157500723.

The spelling of 8397806420 in words is "eight billion, three hundred ninety-seven million, eight hundred six thousand, four hundred twenty".