7897189860 has 432 divisors, whose sum is σ = 30474662400. Its totient is φ = 1643120640.

The previous prime is 7897189837. The next prime is 7897189873. The reversal of 7897189860 is 689817987.

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 (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4647291 + ... + 4648989.

It is an arithmetic number, because the mean of its divisors is an integer number (70543200).

Almost surely, 2^7897189860 is an apocalyptic number.

7897189860 is a gapful number since it is divisible by the number (70) 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 7897189860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15237331200).

7897189860 is an abundant number, since it is smaller than the sum of its proper divisors (22577472540).

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

7897189860 is a wasteful number, since it uses less digits than its factorization.

7897189860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776 (or 1764 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 63.

The square root of 7897189860 is about 88866.1344945306. The cubic root of 7897189860 is about 1991.3955229078.

The spelling of 7897189860 in words is "seven billion, eight hundred ninety-seven million, one hundred eighty-nine thousand, eight hundred sixty".