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23238380 = 22511531993
BaseRepresentation
bin101100010100…
…1011011101100
31121201122001202
41120221123230
521422112010
62150025032
7401344244
oct130513354
947648052
1023238380
1112132380
127948178
134a78429
14312cb24
1520906a5
hex16296ec

23238380 has 48 divisors (see below), whose sum is σ = 54268704. Its totient is φ = 8286720.

The previous prime is 23238379. The next prime is 23238401. The reversal of 23238380 is 8383232.

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, 10664 + ... + 12656.

It is an arithmetic number, because the mean of its divisors is an integer number (1130598).

Almost surely, 223238380 is an apocalyptic number.

23238380 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 23238380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27134352).

23238380 is an abundant number, since it is smaller than the sum of its proper divisors (31030324).

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

23238380 is a wasteful number, since it uses less digits than its factorization.

23238380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066 (or 2064 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 23238380 is about 4820.6202920371. The cubic root of 23238380 is about 285.3658173098.

The spelling of 23238380 in words is "twenty-three million, two hundred thirty-eight thousand, three hundred eighty".

Divisors: 1 2 4 5 10 11 20 22 44 53 55 106 110 212 220 265 530 583 1060 1166 1993 2332 2915 3986 5830 7972 9965 11660 19930 21923 39860 43846 87692 105629 109615 211258 219230 422516 438460 528145 1056290 1161919 2112580 2323838 4647676 5809595 11619190 23238380