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228142383 = 3727121859
BaseRepresentation
bin11011001100100…
…10110100101111
3120220021211111220
431212102310233
5431401024013
634345514423
75440115100
oct1546226457
9526254456
10228142383
11107864827
12644a2a13
133835b8c1
142242a3a7
1515067b23
hexd992d2f

228142383 has 24 divisors (see below), whose sum is σ = 358853760. Its totient is φ = 128525040.

The previous prime is 228142337. The next prime is 228142403. The reversal of 228142383 is 383241822.

It is not a de Polignac number, because 228142383 - 26 = 228142319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228141383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 493 + ... + 21366.

It is an arithmetic number, because the mean of its divisors is an integer number (14952240).

Almost surely, 2228142383 is an apocalyptic number.

228142383 is a deficient number, since it is larger than the sum of its proper divisors (130711377).

228142383 is a wasteful number, since it uses less digits than its factorization.

228142383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21947 (or 21940 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 228142383 is about 15104.3829069578. The cubic root of 228142383 is about 611.0386166922.

The spelling of 228142383 in words is "two hundred twenty-eight million, one hundred forty-two thousand, three hundred eighty-three".

Divisors: 1 3 7 21 49 71 147 213 497 1491 3479 10437 21859 65577 153013 459039 1071091 1551989 3213273 4655967 10863923 32591769 76047461 228142383