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28671146 = 2717179673
BaseRepresentation
bin110110101011…
…1110010101010
31222221122102022
41231113302222
524314434041
62502304442
7465462230
oct155276252
958848368
1028671146
1115203069
129728122
135c2b19a
143b44950
1527b524b
hex1b57caa

28671146 has 32 divisors (see below), whose sum is σ = 52410240. Its totient is φ = 11483136.

The previous prime is 28671143. The next prime is 28671191. The reversal of 28671146 is 64117682.

It is a super-2 number, since 2×286711462 = 1644069225906632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28671143) 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, 42266 + ... + 42938.

It is an arithmetic number, because the mean of its divisors is an integer number (1637820).

Almost surely, 228671146 is an apocalyptic number.

28671146 is a deficient number, since it is larger than the sum of its proper divisors (23739094).

28671146 is a wasteful number, since it uses less digits than its factorization.

28671146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878.

The product of its digits is 16128, while the sum is 35.

The square root of 28671146 is about 5354.5444250655. The cubic root of 28671146 is about 306.0659504425.

The spelling of 28671146 in words is "twenty-eight million, six hundred seventy-one thousand, one hundred forty-six".

Divisors: 1 2 7 14 17 34 119 179 238 358 673 1253 1346 2506 3043 4711 6086 9422 11441 21301 22882 42602 80087 120467 160174 240934 843269 1686538 2047939 4095878 14335573 28671146