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28676055 = 3523431933
BaseRepresentation
bin110110101100…
…0111111010111
31222221220011010
41231120333113
524320113210
62502343303
7465512442
oct155307727
958856133
1028676055
1115206821
12972ab33
135c304a5
143b46659
1527b6920
hex1b58fd7

28676055 has 32 divisors (see below), whose sum is σ = 49015296. Its totient is φ = 14281344.

The previous prime is 28676029. The next prime is 28676057. The reversal of 28676055 is 55067682.

It is a happy number.

It is not a de Polignac number, because 28676055 - 217 = 28544983 is a prime.

It is a super-2 number, since 2×286760552 = 1644632260726050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28676057) 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 31 ways as a sum of consecutive naturals, for example, 13869 + ... + 15801.

It is an arithmetic number, because the mean of its divisors is an integer number (1531728).

Almost surely, 228676055 is an apocalyptic number.

28676055 is a deficient number, since it is larger than the sum of its proper divisors (20339241).

28676055 is a wasteful number, since it uses less digits than its factorization.

28676055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 28676055 is about 5355.0028011197. The cubic root of 28676055 is about 306.0834173877.

The spelling of 28676055 in words is "twenty-eight million, six hundred seventy-six thousand, fifty-five".

Divisors: 1 3 5 15 23 43 69 115 129 215 345 645 989 1933 2967 4945 5799 9665 14835 28995 44459 83119 133377 222295 249357 415595 666885 1246785 1911737 5735211 9558685 28676055