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228793902 = 23891572729
BaseRepresentation
bin11011010001100…
…01111000101110
3120221111221020020
431220301320232
5432032401102
634411503010
75445500421
oct1550617056
9527457206
10228793902
1110816a277
1264757a66
133852930c
14225599b8
1515145bbc
hexda31e2e

228793902 has 32 divisors (see below), whose sum is σ = 465847200. Its totient is φ = 74899968.

The previous prime is 228793843. The next prime is 228793909. The reversal of 228793902 is 209397822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228793909) 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, 82474 + ... + 85202.

It is an arithmetic number, because the mean of its divisors is an integer number (14557725).

Almost surely, 2228793902 is an apocalyptic number.

228793902 is an abundant number, since it is smaller than the sum of its proper divisors (237053298).

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

228793902 is a wasteful number, since it uses less digits than its factorization.

228793902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 228793902 is about 15125.9347479751. The cubic root of 228793902 is about 611.6197229608.

The spelling of 228793902 in words is "two hundred twenty-eight million, seven hundred ninety-three thousand, nine hundred two".

Divisors: 1 2 3 6 89 157 178 267 314 471 534 942 2729 5458 8187 13973 16374 27946 41919 83838 242881 428453 485762 728643 856906 1285359 1457286 2570718 38132317 76264634 114396951 228793902