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228047172 = 22371267661
BaseRepresentation
bin11011001011110…
…11100101000100
3120220002222220120
431211323211010
5431340002142
634343501540
75436240363
oct1545734504
9526088816
10228047172
111077aa241
12644578b0
1338327472
14224037da
15150497ec
hexd97b944

228047172 has 24 divisors (see below), whose sum is σ = 539606592. Its totient is φ = 74944800.

The previous prime is 228047161. The next prime is 228047173. The reversal of 228047172 is 271740822.

Adding to 228047172 its reverse (271740822), we get a palindrome (499787994).

It is not an unprimeable number, because it can be changed into a prime (228047173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132979 + ... + 134682.

It is an arithmetic number, because the mean of its divisors is an integer number (22483608).

Almost surely, 2228047172 is an apocalyptic number.

It is an amenable number.

228047172 is an abundant number, since it is smaller than the sum of its proper divisors (311559420).

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

228047172 is a wasteful number, since it uses less digits than its factorization.

228047172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267739 (or 267737 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 228047172 is about 15101.2308107651. The cubic root of 228047172 is about 610.9536029799.

The spelling of 228047172 in words is "two hundred twenty-eight million, forty-seven thousand, one hundred seventy-two".

Divisors: 1 2 3 4 6 12 71 142 213 284 426 852 267661 535322 802983 1070644 1605966 3211932 19003931 38007862 57011793 76015724 114023586 228047172