Search a number
-
+
30000000000 = 2103510
BaseRepresentation
bin11011111100001000…
…111010110000000000
32212102202021220101010
4123330020322300000
5442420000000000
621440512040520
72111266535565
oct337410726000
985382256333
1030000000000
11117a5244033
125992b33140
132aa13950b9
14164844886c
15ba8b28d50
hex6fc23ac00

30000000000 has 242 divisors, whose sum is σ = 99951169828. Its totient is φ = 8000000000.

The previous prime is 29999999993. The next prime is 30000000001. The reversal of 30000000000 is 3.

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (30000000001) by changing a digit.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 5999999998 + ... + 6000000002.

Almost surely, 230000000000 is an apocalyptic number.

30000000000 is a gapful number since it is divisible by the number (30) 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 30000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49975584914).

30000000000 is an abundant number, since it is smaller than the sum of its proper divisors (69951169828).

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

30000000000 is an frugal number, since it uses more digits than its factorization.

30000000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 3, while the sum is 3.

The spelling of 30000000000 in words is "thirty billion", and thus it is an aban number, an eban number, and an uban number.