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428643933 = 31721926021
BaseRepresentation
bin11001100011001…
…001011001011101
31002212120100221020
4121203021121131
51334213101213
6110311154353
713423261524
oct3143113135
91085510836
10428643933
111aaa5a593
12bb6759b9
136aa60283
1440cdd4bb
1527970923
hex198c965d

428643933 has 24 divisors (see below), whose sum is σ = 639100320. Its totient is φ = 254787840.

The previous prime is 428643931. The next prime is 428643937. The reversal of 428643933 is 339346824.

It is not a de Polignac number, because 428643933 - 21 = 428643931 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428643931) 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, 3463 + ... + 29483.

It is an arithmetic number, because the mean of its divisors is an integer number (26629180).

Almost surely, 2428643933 is an apocalyptic number.

It is an amenable number.

428643933 is a deficient number, since it is larger than the sum of its proper divisors (210456387).

428643933 is a wasteful number, since it uses less digits than its factorization.

428643933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26077 (or 26060 counting only the distinct ones).

The product of its digits is 373248, while the sum is 42.

The square root of 428643933 is about 20703.7178545304. The cubic root of 428643933 is about 753.9899555872.

The spelling of 428643933 in words is "four hundred twenty-eight million, six hundred forty-three thousand, nine hundred thirty-three".

Divisors: 1 3 17 19 51 57 289 323 867 969 5491 16473 26021 78063 442357 494399 1327071 1483197 7520069 8404783 22560207 25214349 142881311 428643933