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189840000000 = 2103577113
BaseRepresentation
bin1011000011001101011…
…0001000010000000000
3200011000021110012122010
42300303112020100000
511102243020000000
6223113350012520
716500261242520
oct2606326102000
9604007405563
10189840000000
1173568804892
1230961047140
1314b95441261
14928c9cd680
154e1150dd50
hex2c33588400

189840000000 has 704 divisors, whose sum is σ = 729241883136. Its totient is φ = 43008000000.

The previous prime is 189839999981. The next prime is 189840000001. The reversal of 189840000000 is 48981.

It is a happy number.

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

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 11300 × 1500 × 11200.

It is not an unprimeable number, because it can be changed into a prime (189840000001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1679999944 + ... + 1680000056.

Almost surely, 2189840000000 is an apocalyptic number.

189840000000 is a gapful number since it is divisible by the number (10) 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 189840000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364620941568).

189840000000 is an abundant number, since it is smaller than the sum of its proper divisors (539401883136).

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

189840000000 is an frugal number, since it uses more digits than its factorization.

189840000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

Adding to 189840000000 its reverse (48981), we get a palindrome (189840048981).

The spelling of 189840000000 in words is "one hundred eighty-nine billion, eight hundred forty million", and thus it is an aban number.