2173878000 has 640 divisors, whose sum is σ = 9136558080. Its totient is φ = 489888000.

The previous prime is 2173877999. The next prime is 2173878001. The reversal of 2173878000 is 8783712.

It is an interprime number because it is at equal distance from previous prime (2173877999) and next prime (2173878001).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173878001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 30617965 + ... + 30618035.

It is an arithmetic number, because the mean of its divisors is an integer number (14275872).

Almost surely, 2^2173878000 is an apocalyptic number.

2173878000 is a gapful number since it is divisible by the number (20) 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 2173878000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4568279040).

2173878000 is an abundant number, since it is smaller than the sum of its proper divisors (6962680080).

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

2173878000 is an frugal number, since it uses more digits than its factorization.

2173878000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 2173878000 is about 46624.8646110635. The cubic root of 2173878000 is about 1295.4233545751.

The spelling of 2173878000 in words is "two billion, one hundred seventy-three million, eight hundred seventy-eight thousand".