6397789860 has 720 divisors, whose sum is σ = 27030060288. Its totient is φ = 1248307200.

The previous prime is 6397789859. The next prime is 6397789913. The reversal of 6397789860 is 689877936.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 239 ways as a sum of consecutive naturals, for example, 14843845 + ... + 14844275.

Almost surely, 2^6397789860 is an apocalyptic number.

6397789860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6397789860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13515030144).

6397789860 is an abundant number, since it is smaller than the sum of its proper divisors (20632270428).

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

6397789860 is a wasteful number, since it uses less digits than its factorization.

6397789860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The square root of 6397789860 is about 79986.1854322357. The cubic root of 6397789860 is about 1856.4217888149.

The spelling of 6397789860 in words is "six billion, three hundred ninety-seven million, seven hundred eighty-nine thousand, eight hundred sixty".