2173900800 has 144 divisors (see below), whose sum is σ = 7187118120. Its totient is φ = 579665920.

The previous prime is 2173900759. The next prime is 2173900801. The reversal of 2173900800 is 80093712.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173900801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146524 + ... + 160676.

Almost surely, 2^2173900800 is an apocalyptic number.

2173900800 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 2173900800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3593559060).

2173900800 is an abundant number, since it is smaller than the sum of its proper divisors (5013217320).

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

2173900800 is a wasteful number, since it uses less digits than its factorization.

2173900800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14188 (or 14163 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2173900800 is about 46625.1091151538. The cubic root of 2173900800 is about 1295.4278834324.

The spelling of 2173900800 in words is "two billion, one hundred seventy-three million, nine hundred thousand, eight hundred".