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228066880 = 2651937511
BaseRepresentation
bin11011001100000…
…00011001000000
3120220010222221111
431212000121000
5431341120010
634344133104
75436352006
oct1546003100
9526128844
10228066880
11107813028
1264467194
1338333422
142240aa76
151505058a
hexd980640

228066880 has 56 divisors (see below), whose sum is σ = 571682880. Its totient is φ = 86423040.

The previous prime is 228066877. The next prime is 228066893. The reversal of 228066880 is 88660822.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12676 + ... + 24835.

Almost surely, 2228066880 is an apocalyptic number.

228066880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228066880 is an abundant number, since it is smaller than the sum of its proper divisors (343616000).

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

228066880 is a wasteful number, since it uses less digits than its factorization.

228066880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37547 (or 37537 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 228066880 is about 15101.8833262610. The cubic root of 228066880 is about 610.9712021557.

The spelling of 228066880 in words is "two hundred twenty-eight million, sixty-six thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 16 19 20 32 38 40 64 76 80 95 152 160 190 304 320 380 608 760 1216 1520 3040 6080 37511 75022 150044 187555 300088 375110 600176 712709 750220 1200352 1425418 1500440 2400704 2850836 3000880 3563545 5701672 6001760 7127090 11403344 12003520 14254180 22806688 28508360 45613376 57016720 114033440 228066880