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28829525 = 527315797
BaseRepresentation
bin110110111111…
…0011101010101
32000020200200012
41231332131111
524340021100
62505530005
7500022044
oct155763525
960220605
1028829525
111530105a
1297a3905
135c852ba
143b8655b
1527e7135
hex1b7e755

28829525 has 12 divisors (see below), whose sum is σ = 36240612. Its totient is φ = 22746240.

The previous prime is 28829483. The next prime is 28829527. The reversal of 28829525 is 52592882.

It can be written as a sum of positive squares in 6 ways, for example, as 3364 + 28826161 = 58^2 + 5369^2 .

It is not a de Polignac number, because 28829525 - 26 = 28829461 is a prime.

It is a super-2 number, since 2×288295252 = 1662283023451250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28829527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6074 + ... + 9723.

It is an arithmetic number, because the mean of its divisors is an integer number (3020051).

Almost surely, 228829525 is an apocalyptic number.

28829525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28829525 is a deficient number, since it is larger than the sum of its proper divisors (7411087).

28829525 is a wasteful number, since it uses less digits than its factorization.

28829525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15880 (or 15875 counting only the distinct ones).

The product of its digits is 115200, while the sum is 41.

The square root of 28829525 is about 5369.3132708010. The cubic root of 28829525 is about 306.6284838777.

The spelling of 28829525 in words is "twenty-eight million, eight hundred twenty-nine thousand, five hundred twenty-five".

Divisors: 1 5 25 73 365 1825 15797 78985 394925 1153181 5765905 28829525