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228130580 = 225591031877
BaseRepresentation
bin11011001100011…
…11111100010100
3120220021020022202
431212033330110
5431400134310
634345344032
75440035506
oct1546177424
9526236282
10228130580
11107856977
1264498018
1338356412
1422425d76
15150643a5
hexd98ff14

228130580 has 48 divisors (see below), whose sum is σ = 492186240. Its totient is φ = 88787328.

The previous prime is 228130579. The next prime is 228130589. The reversal of 228130580 is 85031822.

It is a super-3 number, since 3×2281305803 (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228130589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120602 + ... + 122478.

It is an arithmetic number, because the mean of its divisors is an integer number (10253880).

Almost surely, 2228130580 is an apocalyptic number.

228130580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228130580 is an abundant number, since it is smaller than the sum of its proper divisors (264055660).

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

228130580 is a wasteful number, since it uses less digits than its factorization.

228130580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 228130580 is about 15103.9921874980. The cubic root of 228130580 is about 611.0280791015.

The spelling of 228130580 in words is "two hundred twenty-eight million, one hundred thirty thousand, five hundred eighty".

Divisors: 1 2 4 5 10 20 59 103 118 206 236 295 412 515 590 1030 1180 1877 2060 3754 6077 7508 9385 12154 18770 24308 30385 37540 60770 110743 121540 193331 221486 386662 442972 553715 773324 966655 1107430 1933310 2214860 3866620 11406529 22813058 45626116 57032645 114065290 228130580