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228145204 = 22729280967
BaseRepresentation
bin11011001100100…
…11100000110100
3120220021222101101
431212103200310
5431401121304
634345535444
75440126240
oct1546234064
9526258341
10228145204
11107866961
12644a4584
133835cc81
142242b420
15150688a4
hexd993834

228145204 has 24 divisors (see below), whose sum is σ = 472026240. Its totient is φ = 94404576.

The previous prime is 228145193. The next prime is 228145259. The reversal of 228145204 is 402541822.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 139672 + ... + 141295.

It is an arithmetic number, because the mean of its divisors is an integer number (19667760).

Almost surely, 2228145204 is an apocalyptic number.

It is an amenable number.

228145204 is an abundant number, since it is smaller than the sum of its proper divisors (243881036).

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

228145204 is a wasteful number, since it uses less digits than its factorization.

228145204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281007 (or 281005 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 228145204 is about 15104.4762901598. The cubic root of 228145204 is about 611.0411351967.

The spelling of 228145204 in words is "two hundred twenty-eight million, one hundred forty-five thousand, two hundred four".