Search a number
-
+
230801780 = 225112345613
BaseRepresentation
bin11011100000111…
…00000101110100
3121002021221112002
431300130011310
5433041124110
634522514432
75501532326
oct1560340564
9532257462
10230801780
11109310880
1265365a18
1338a80201
142291d616
15153e0aa5
hexdc1c174

230801780 has 48 divisors (see below), whose sum is σ = 551746944. Its totient is φ = 80277120.

The previous prime is 230801777. The next prime is 230801821. The reversal of 230801780 is 87108032.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17747 + ... + 27866.

It is an arithmetic number, because the mean of its divisors is an integer number (11494728).

Almost surely, 2230801780 is an apocalyptic number.

230801780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230801780 is an abundant number, since it is smaller than the sum of its proper divisors (320945164).

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

230801780 is a wasteful number, since it uses less digits than its factorization.

230801780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45656 (or 45654 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 230801780 is about 15192.1617948204. The cubic root of 230801780 is about 613.4036906003.

The spelling of 230801780 in words is "two hundred thirty million, eight hundred one thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 11 20 22 23 44 46 55 92 110 115 220 230 253 460 506 1012 1265 2530 5060 45613 91226 182452 228065 456130 501743 912260 1003486 1049099 2006972 2098198 2508715 4196396 5017430 5245495 10034860 10490990 11540089 20981980 23080178 46160356 57700445 115400890 230801780