6396874420 has 12 divisors (see below), whose sum is σ = 13433436324. Its totient is φ = 2558749760.

The previous prime is 6396874387. The next prime is 6396874439. The reversal of 6396874420 is 244786936.

It can be written as a sum of positive squares in 2 ways, for example, as 2455797136 + 3941077284 = 49556^2 + 62778^2 .

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 3 ways as a sum of consecutive naturals, for example, 159921841 + ... + 159921880.

It is an arithmetic number, because the mean of its divisors is an integer number (1119453027).

Almost surely, 2^6396874420 is an apocalyptic number.

It is an amenable number.

6396874420 is an abundant number, since it is smaller than the sum of its proper divisors (7036561904).

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

6396874420 is a wasteful number, since it uses less digits than its factorization.

6396874420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319843730 (or 319843728 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 49.

The square root of 6396874420 is about 79980.4627393465. The cubic root of 6396874420 is about 1856.3332413706. Note that the first 3 decimals are identical.

The spelling of 6396874420 in words is "six billion, three hundred ninety-six million, eight hundred seventy-four thousand, four hundred twenty".