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27428975 = 527222391
BaseRepresentation
bin110100010100…
…0100001101111
31220121112110222
41220220201233
524010211400
62415521555
7452066600
oct150504157
956545428
1027428975
1114534882
1292292bb
1358b4982
1438ddda7
15261c185
hex1a2886f

27428975 has 18 divisors (see below), whose sum is σ = 39566664. Its totient is φ = 18807600.

The previous prime is 27428971. The next prime is 27428987. The reversal of 27428975 is 57982472.

It is not a de Polignac number, because 27428975 - 22 = 27428971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27428971) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9971 + ... + 12420.

It is an arithmetic number, because the mean of its divisors is an integer number (2198148).

Almost surely, 227428975 is an apocalyptic number.

27428975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27428975 is a deficient number, since it is larger than the sum of its proper divisors (12137689).

27428975 is a wasteful number, since it uses less digits than its factorization.

27428975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22415 (or 22403 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The square root of 27428975 is about 5237.2678946183. The cubic root of 27428975 is about 301.5804555427.

The spelling of 27428975 in words is "twenty-seven million, four hundred twenty-eight thousand, nine hundred seventy-five".

Divisors: 1 5 7 25 35 49 175 245 1225 22391 111955 156737 559775 783685 1097159 3918425 5485795 27428975